Model (LibSBML Java API)

java.lang.Object
- org.sbml.libsbml.SBase
- - org.sbml.libsbml.Model

Direct Known Subclasses:

ModelDefinition
```
public class Model
extends SBase
```
Implementation of SBML's Model construct.
In an SBML model definition, a single object of class Model serves as the overall container for the lists of the various model components. All of the lists are optional, but if a given list container is present within the model, the list must not be empty that is, it must have length one or more. The following are the components and lists permitted in different Levels and Versions of SBML in version 5.10.0 of libSBML:
- In SBML Level 1, the components are: UnitDefinition, Compartment, Species, Parameter, Rule, and Reaction. Instances of the classes are placed inside instances of classes ListOfUnitDefinitions, ListOfCompartments, ListOfSpecies, ListOfParameters, ListOfRules, and ListOfReactions.
- In SBML Level 2 Version 1, the components are: FunctionDefinition, UnitDefinition, Compartment, Species, Parameter, Rule, Reaction and Event. Instances of the classes are placed inside instances of classes ListOfFunctionDefinitions, ListOfUnitDefinitions, ListOfCompartments, ListOfSpecies, ListOfParameters, ListOfRules, ListOfReactions, and ListOfEvents.
- In SBML Level 2 Versions 2, 3 and 4, the components are: FunctionDefinition, UnitDefinition, CompartmentType, SpeciesType, Compartment, Species, Parameter, InitialAssignment, Rule, Constraint, Reaction and Event. Instances of the classes are placed inside instances of classes ListOfFunctionDefinitions, ListOfUnitDefinitions, ListOfCompartmentTypes, ListOfSpeciesTypes, ListOfCompartments, ListOfSpecies, ListOfParameters, ListOfInitialAssignments, ListOfRules, ListOfConstraints, ListOfReactions, and ListOfEvents.
- In SBML Level 3 Version 1, the components are: FunctionDefinition, UnitDefinition, Compartment, Species, Parameter, InitialAssignment, Rule, Constraint, Reaction and Event. Instances of the classes are placed inside instances of classes ListOfFunctionDefinitions, ListOfUnitDefinitions, ListOfCompartments, ListOfSpecies, ListOfParameters, ListOfInitialAssignments, ListOfRules, ListOfConstraints, ListOfReactions, and ListOfEvents.
Although all the lists are optional, there are dependencies between SBML components such that defining some components requires defining others. An example is that defining a species requires defining a compartment, and defining a reaction requires defining a species. The dependencies are explained in more detail in the SBML specifications.
In addition to the above lists and attributes, the Model class in both SBML Level 2 and Level 3 has the usual two attributes of 'id' and 'name', and both are optional. As is the case for other SBML components with 'id' and 'name' attributes, they must be used according to the guidelines described in the SBML specifications. (Within the frameworks of SBML Level 2 and Level 3 Version 1 Core, a Model object identifier has no assigned meaning, but extension packages planned for SBML Level 3 are likely to make use of this identifier.)
Finally, SBML Level 3 has introduced a number of additional Model attributes. They are discussed in a separate section below.

Approaches to creating objects using the libSBML API

LibSBML provides two main mechanisms for creating objects: class constructors (e.g., Species() ), and createObject() methods (such as Model.createSpecies()) provided by certain Object classes such as Model. These multiple mechanisms are provided by libSBML for flexibility and to support different use-cases, but they also have different implications for the overall model structure.
In general, the recommended approach is to use the createObject() methods. These methods both create an object and link it to the parent in one step. Here is an example:
```
// Create an SBMLDocument object in Level 3 Version 1 format:

SBMLDocument sbmlDoc = new SBMLDocument(3, 1)

// Create a Model object inside the SBMLDocument object and set
// its identifier.  The call returns a pointer to the Model object
// created, and methods called on that object affect the attributes
// of the object attached to the model (as expected).  Note that
// the call to setId() returns a status code, and a real program
// should check this status code to make sure everything went okay.

Model model = sbmlDoc.createModel()
model.setId("BestModelEver")

// Create a Species object inside the Model and set its identifier.
// Similar to the lines above, this call returns a pointer to the Species
// object created, and methods called on that object affect the attributes
// of the object attached to the model (as expected).  Note that, like
// with Model, the call to setId() returns a status code, and a real program
// should check this status code to make sure everything went okay.

Species sp = model.createSpecies()
sp.setId("BestSpeciesEver")
```
The createObject() methods return a pointer to the object created, but they also add the object to the relevant list of object instances contained in the parent. (These lists become the <listOfObjects> elements in the finished XML rendition of SBML.) In the example above, Model.createSpecies() adds the created species directly to the <listOfSpeciesgt list in the model. Subsequently, methods called on the species change the species in the model (which is what is expected in most situations).

Consistency and adherence to SBML specifications

To make it easier for applications to do whatever they need, libSBML version 5.10.0 is relatively lax when it comes to enforcing correctness and completeness of models during model construction and editing. Essentially, libSBML will not in most cases check automatically that a model's components have valid attribute values, or that the overall model is consistent and free of errors&mdasheven obvious errors such as duplication of identifiers. This allows applications great leeway in how they build their models, but it means that software authors must take deliberate steps to ensure that the model will be, in the end, valid SBML. These steps include such things as keeping track of the identifiers used in a model, manually performing updates in certain situations where an entity is referenced in more than one place (e.g., a species that is referenced by multiple SpeciesReference objects), and so on.
That said, libSBML does provide powerful features for deliberately performing validation of SBML when an application decides it is time to do so. The interfaces to these facilities are on the SBMLDocument class, in the form of SBMLDocument.checkInternalConsistency() and SBMLDocument.checkConsistency(). Please refer to the documentation for SBMLDocument for more information about this.
While applications may play fast and loose and live like free spirits during the construction and editing of SBML models, they should always make sure to call SBMLDocument.checkInternalConsistency() and/or SBMLDocument.checkConsistency() before writing out the final version of an SBML model.

Model attributes introduced in SBML Level 3

As mentioned above, the Model class has a number of optional attributes in SBML Level 3 Version 1 Core. These are 'substanceUnits', 'timeUnits', 'volumeUnits', 'areaUnits', 'lengthUnits', 'extentUnits', and 'conversionFactor. The following provide more information about them.

The 'substanceUnits' attribute

The 'substanceUnits' attribute is used to specify the unit of measurement associated with substance quantities of Species objects that do not specify units explicitly. If a given Species object definition does not specify its unit of substance quantity via the 'substanceUnits' attribute on the Species object instance, then that species inherits the value of the Model 'substanceUnits' attribute. If the Model does not define a value for this attribute, then there is no unit to inherit, and all species that do not specify individual 'substanceUnits' attribute values then have no declared units for their quantities. The SBML Level 3 Version 1 Core specification provides more details.
Note that when the identifier of a species appears in a model's mathematical expressions, the unit of measurement associated with that identifier is not solely determined by setting 'substanceUnits' on Model or Species. Please see the discussion about units given in the documentation for the Species class.

The 'timeUnits' attribute

The 'timeUnits' attribute on SBML Level 3's Model object is used to specify the unit in which time is measured in the model. This attribute on Model is the only way to specify a unit for time in a model. It is a global attribute time is measured in the model everywhere in the same way. This is particularly relevant to Reaction and RateRule objects in a model: all Reaction and RateRule objects in SBML define per-time values, and the unit of time is given by the 'timeUnits' attribute on the Model object instance. If the Model 'timeUnits' attribute has no value, it means that the unit of time is not defined for the model's reactions and rate rules. Leaving it unspecified in an SBML model does not result in an invalid model in SBML Level 3 however, as a matter of best practice, we strongly recommend that all models specify units of measurement for time.

The 'volumeUnits', 'areaUnits', and 'lengthUnits' attributes

The attributes 'volumeUnits', 'areaUnits' and 'lengthUnits' together are used to set the units of measurements for the sizes of Compartment objects in an SBML Level 3 model when those objects do not otherwise specify units. The three attributes correspond to the most common cases of compartment dimensions: 'volumeUnits' for compartments having a 'spatialDimensions' attribute value of '3', 'areaUnits' for compartments having a 'spatialDimensions' attribute value of '2', and 'lengthUnits' for compartments having a 'spatialDimensions' attribute value of '1'. The attributes are not applicable to compartments whose 'spatialDimensions' attribute values are not one of '1', '2' or '3'.
If a given Compartment object instance does not provide a value for its 'units' attribute, then the unit of measurement of that compartment's size is inherited from the value specified by the Model 'volumeUnits', 'areaUnits' or 'lengthUnits' attribute, as appropriate based on the Compartment object's 'spatialDimensions' attribute value. If the Model object does not define the relevant attribute, then there are no units to inherit, and all Compartment objects that do not set a value for their 'units' attribute then have no units associated with their compartment sizes.
The use of three separate attributes is a carry-over from SBML Level 2. Note that it is entirely possible for a model to define a value for two or more of the attributes 'volumeUnits', 'areaUnits' and 'lengthUnits' simultaneously, because SBML models may contain compartments with different numbers of dimensions.

The 'extentUnits' attribute

Reactions are processes that occur over time. These processes involve events of some sort, where a single ``reaction event'' is one in which some set of entities (known as reactants, products and modifiers in SBML) interact, once. The extent of a reaction is a measure of how many times the reaction has occurred, while the time derivative of the extent gives the instantaneous rate at which the reaction is occurring. Thus, what is colloquially referred to as the 'rate of the reaction' is in fact equal to the rate of change of reaction extent.
In SBML Level 3, the combination of 'extentUnits' and 'timeUnits' defines the units of kinetic laws in SBML and establishes how the numerical value of each KineticLaw object's mathematical formula is meant to be interpreted in a model. The units of the kinetic laws are taken to be 'extentUnits' divided by 'timeUnits'.
Note that this embodies an important principle in SBML Level 3 models: all reactions in an SBML model must have the same units for the rate of change of extent. In other words, the units of all reaction rates in the model must be the same. There is only one global value for 'extentUnits' and one global value for 'timeUnits'.

The 'conversionFactor' attribute

The attribute 'conversionFactor' in SBML Level 3's Model object defines a global value inherited by all Species object instances that do not define separate values for their 'conversionFactor' attributes. The value of this attribute must refer to a Parameter object instance defined in the model. The Parameter object in question must be a constant ie it must have its 'constant' attribute value set to 'true'.
If a given Species object definition does not specify a conversion factor via the 'conversionFactor' attribute on Species, then the species inherits the conversion factor specified by the Model 'conversionFactor' attribute. If the Model does not define a value for this attribute, then there is no conversion factor to inherit. More information about conversion factors is provided in the SBML Level 3 Version 1 specification.

Constructor Summary

Constructors
Constructor and Description
`Model(long level, long version)` Creates a new `Model` using the given SBML `level` and `version` values.
`Model(Model orig)` Copy constructor creates a (deep) copy of the given `Model` object.
`Model(SBMLNamespaces sbmlns)` Creates a new `Model` using the given `SBMLNamespaces` object `sbmlns`.

Method Summary

Methods
Modifier and Type	Method and Description
`int`	`addCompartment(Compartment c)` Adds a copy of the given `Compartment` object to this `Model`.
`int`	`addCompartmentType(CompartmentType ct)` Adds a copy of the given `CompartmentType` object to this `Model`.
`int`	`addConstraint(Constraint c)` Adds a copy of the given `Constraint` object to this `Model`.
`int`	`addEvent(Event e)` Adds a copy of the given `Event` object to this `Model`.
`int`	`addFunctionDefinition(FunctionDefinition fd)` Adds a copy of the given `FunctionDefinition` object to this `Model`.
`int`	`addInitialAssignment(InitialAssignment ia)` Adds a copy of the given `InitialAssignment` object to this `Model`.
`int`	`addParameter(Parameter p)` Adds a copy of the given `Parameter` object to this `Model`.
`int`	`addReaction(Reaction r)` Adds a copy of the given `Reaction` object to this `Model`.
`int`	`addRule(Rule r)` Adds a copy of the given `Rule` object to this `Model`.
`int`	`addSpecies(Species s)` Adds a copy of the given `Species` object to this `Model`.
`int`	`addSpeciesType(SpeciesType st)` Adds a copy of the given `SpeciesType` object to this `Model`.
`int`	`addUnitDefinition(UnitDefinition ud)` Adds a copy of the given `UnitDefinition` object to this `Model`.
`int`	`appendAnnotation(java.lang.String annotation)` Appends annotation content to any existing content in the 'annotation' subelement of this object.
`int`	`appendAnnotation(XMLNode annotation)` Appends annotation content to any existing content in the 'annotation' subelement of this object.
`int`	`appendFrom(Model model)` Takes the contents of the passed-in `Model`, makes copies of everything, and appends those copies to the appropriate places in this `Model`.
`Model`	`cloneObject()` Creates and returns a deep copy of this `Model` object.
`AlgebraicRule`	`createAlgebraicRule()` Creates a new `AlgebraicRule` inside this `Model` and returns it.
`AssignmentRule`	`createAssignmentRule()` Creates a new `AssignmentRule` inside this `Model` and returns it.
`Compartment`	`createCompartment()` Creates a new `Compartment` inside this `Model` and returns it.
`CompartmentType`	`createCompartmentType()` Creates a new `CompartmentType` inside this `Model` and returns it.
`Constraint`	`createConstraint()` Creates a new `Constraint` inside this `Model` and returns it.
`Delay`	`createDelay()` Creates a new `Delay` inside the last `Event` object created in this `Model`, and returns a pointer to it.
`Event`	`createEvent()` Creates a new `Event` inside this `Model` and returns it.
`EventAssignment`	`createEventAssignment()` Creates a new `EventAssignment` inside the last `Event` object created in this `Model`, and returns a pointer to it.
`FunctionDefinition`	`createFunctionDefinition()` Creates a new `FunctionDefinition` inside this `Model` and returns it.
`InitialAssignment`	`createInitialAssignment()` Creates a new `InitialAssignment` inside this `Model` and returns it.
`KineticLaw`	`createKineticLaw()` Creates a new `KineticLaw` inside the last `Reaction` object created in this `Model`, and returns a pointer to it.
`LocalParameter`	`createKineticLawLocalParameter()` Creates a new `LocalParameter` inside the `KineticLaw` object of the last `Reaction` created inside this `Model`, and returns a pointer to it.
`Parameter`	`createKineticLawParameter()` Creates a new local `Parameter` inside the `KineticLaw` object of the last `Reaction` created inside this `Model`, and returns a pointer to it.
`ModifierSpeciesReference`	`createModifier()` Creates a new `ModifierSpeciesReference` object for a modifier species inside the last `Reaction` object in this `Model`, and returns a pointer to it.
`Parameter`	`createParameter()` Creates a new `Parameter` inside this `Model` and returns it.
`SpeciesReference`	`createProduct()` Creates a new `SpeciesReference` object for a product inside the last `Reaction` object in this `Model`, and returns a pointer to it.
`RateRule`	`createRateRule()` Creates a new `RateRule` inside this `Model` and returns it.
`SpeciesReference`	`createReactant()` Creates a new `SpeciesReference` object for a reactant inside the last `Reaction` object in this `Model`, and returns a pointer to it.
`Reaction`	`createReaction()` Creates a new `Reaction` inside this `Model` and returns it.
`Species`	`createSpecies()` Creates a new `Species` inside this `Model` and returns it.
`SpeciesType`	`createSpeciesType()` Creates a new `SpeciesType` inside this `Model` and returns it.
`Trigger`	`createTrigger()` Creates a new `Trigger` inside the last `Event` object created in this `Model`, and returns a pointer to it.
`Unit`	`createUnit()` Creates a new `Unit` object within the last `UnitDefinition` object created in this model and returns a pointer to it.
`UnitDefinition`	`createUnitDefinition()` Creates a new `UnitDefinition` inside this `Model` and returns it.
`void`	`delete()` Explicitly deletes the underlying native object.
`java.lang.String`	`getAreaUnits()` Returns the value of the 'areaUnits' attribute of this `Model`.
`AssignmentRule`	`getAssignmentRule(java.lang.String variable)` Get a `Rule` object based on the variable to which it assigns a value.
`AssignmentRule`	`getAssignmentRuleByVariable(java.lang.String variable)` Get a `Rule` object based on the variable to which it assigns a value.
`Compartment`	`getCompartment(long n)` Get the nth `Compartment` object in this `Model`.
`Compartment`	`getCompartment(java.lang.String sid)` Get a `Compartment` object based on its identifier.
`CompartmentType`	`getCompartmentType(long n)` Get the nth `CompartmentType` object in this `Model`.
`CompartmentType`	`getCompartmentType(java.lang.String sid)` Get a `CompartmentType` object based on its identifier.
`Constraint`	`getConstraint(long n)` Get the nth `Constraint` object in this `Model`.
`java.lang.String`	`getConversionFactor()` Returns the value of the 'conversionFactor' attribute of this `Model`.
`SBase`	`getElementByMetaId(java.lang.String metaid)` Returns the first child element it can find with the given `metaid`, or null if no such object is found.
`SBase`	`getElementBySId(java.lang.String id)` Returns the first child element found that has the given `id` in the model-wide SId namespace, or `null` if no such object is found.
`java.lang.String`	`getElementName()` Returns the XML element name of this object, which for `Model`, is always `'model'.`
`Event`	`getEvent(long n)` Get the nth `Event` object in this `Model`.
`Event`	`getEvent(java.lang.String sid)` Get an `Event` object based on its identifier.
`java.lang.String`	`getExtentUnits()` Returns the value of the 'extentUnits' attribute of this `Model`.
`FunctionDefinition`	`getFunctionDefinition(long n)` Get the nth FunctionDefinitions object in this `Model`.
`FunctionDefinition`	`getFunctionDefinition(java.lang.String sid)` Get a `FunctionDefinition` object based on its identifier.
`java.lang.String`	`getId()` Returns the value of the 'id' attribute of this `Model`.
`InitialAssignment`	`getInitialAssignment(long n)` Get the nth `InitialAssignment` object in this `Model`.
`InitialAssignment`	`getInitialAssignment(java.lang.String symbol)` Get an `InitialAssignment` object based on the symbol to which it assigns a value.
`InitialAssignment`	`getInitialAssignmentBySymbol(java.lang.String symbol)` Get an `InitialAssignment` object based on the symbol to which it assigns a value.
`java.lang.String`	`getLengthUnits()` Returns the value of the 'lengthUnits' attribute of this `Model`.
`ListOfCompartments`	`getListOfCompartments()` Get the `ListOfCompartments` object in this `Model`.
`ListOfCompartmentTypes`	`getListOfCompartmentTypes()` Get the `ListOfCompartmentTypes` object in this `Model`.
`ListOfConstraints`	`getListOfConstraints()` Get the `ListOfConstraints` object in this `Model`.
`ListOfEvents`	`getListOfEvents()` Get the `ListOfEvents` object in this `Model`.
`ListOfFunctionDefinitions`	`getListOfFunctionDefinitions()` Get the `ListOfFunctionDefinitions` object in this `Model`.
`ListOfInitialAssignments`	`getListOfInitialAssignments()` Get the `ListOfInitialAssignments` object in this `Model`.
`ListOfParameters`	`getListOfParameters()` Get the `ListOfParameters` object in this `Model`.
`ListOfReactions`	`getListOfReactions()` Get the `ListOfReactions` object in this `Model`.
`ListOfRules`	`getListOfRules()` Get the `ListOfRules` object in this `Model`.
`ListOfSpecies`	`getListOfSpecies()` Get the `ListOfSpecies` object in this `Model`.
`ListOfSpeciesTypes`	`getListOfSpeciesTypes()` Get the `ListOfSpeciesTypes` object in this `Model`.
`ListOfUnitDefinitions`	`getListOfUnitDefinitions()` Get the `ListOfUnitDefinitions` object in this `Model`.
`ModifierSpeciesReference`	`getModifierSpeciesReference(java.lang.String sid)` Get a `ModifierSpeciesReference` object based on its identifier.
`java.lang.String`	`getName()` Returns the value of the 'name' attribute of this `Model`.
`long`	`getNumCompartments()` Get the number of `Compartment` objects in this `Model`.
`long`	`getNumCompartmentTypes()` Get the number of `CompartmentType` objects in this `Model`.
`long`	`getNumConstraints()` Get the number of `Constraint` objects in this `Model`.
`long`	`getNumEvents()` Get the number of `Event` objects in this `Model`.
`long`	`getNumFunctionDefinitions()` Get the number of `FunctionDefinition` objects in this `Model`.
`long`	`getNumInitialAssignments()` Get the number of `InitialAssignment` objects in this `Model`.
`long`	`getNumParameters()` Get the number of `Parameter` objects in this `Model`.
`long`	`getNumReactions()` Get the number of `Reaction` objects in this `Model`.
`long`	`getNumRules()` Get the number of `Rule` objects in this `Model`.
`long`	`getNumSpecies()` Get the number of Specie objects in this `Model`.
`long`	`getNumSpeciesTypes()` Get the number of `SpeciesType` objects in this `Model`.
`long`	`getNumSpeciesWithBoundaryCondition()` Get the number of `Species` in this `Model` having their 'boundaryCondition' attribute value set to `true.`
`long`	`getNumUnitDefinitions()` Get the number of `UnitDefinition` objects in this `Model`.
`Parameter`	`getParameter(long n)` Get the nth `Parameter` object in this `Model`.
`Parameter`	`getParameter(java.lang.String sid)` Get a `Parameter` object based on its identifier.
`RateRule`	`getRateRule(java.lang.String variable)` Get a `Rule` object based on the variable to which it assigns a value.
`RateRule`	`getRateRuleByVariable(java.lang.String variable)` Get a `Rule` object based on the variable to which it assigns a value.
`Reaction`	`getReaction(long n)` Get the nth `Reaction` object in this `Model`.
`Reaction`	`getReaction(java.lang.String sid)` Get a `Reaction` object based on its identifier.
`Rule`	`getRule(long n)` Get the nth `Rule` object in this `Model`.
`Rule`	`getRule(java.lang.String variable)` Get a `Rule` object based on the variable to which it assigns a value.
`Rule`	`getRuleByVariable(java.lang.String variable)` Get a `Rule` object based on the variable to which it assigns a value.
`Species`	`getSpecies(long n)` Get the nth `Species` object in this `Model`.
`Species`	`getSpecies(java.lang.String sid)` Get a `Species` object based on its identifier.
`SpeciesReference`	`getSpeciesReference(java.lang.String sid)` Get a `SpeciesReference` object based on its identifier.
`SpeciesType`	`getSpeciesType(long n)` Get the nth `SpeciesType` object in this `Model`.
`SpeciesType`	`getSpeciesType(java.lang.String sid)` Get a `SpeciesType` object based on its identifier.
`java.lang.String`	`getSubstanceUnits()` Returns the value of the 'substanceUnits' attribute of this `Model`.
`java.lang.String`	`getTimeUnits()` Returns the value of the 'timeUnits' attribute of this `Model`.
`int`	`getTypeCode()` Returns the libSBML type code for this SBML object.
`UnitDefinition`	`getUnitDefinition(long n)` Get the nth `UnitDefinition` object in this `Model`.
`UnitDefinition`	`getUnitDefinition(java.lang.String sid)` Get a `UnitDefinition` based on its identifier.
`java.lang.String`	`getVolumeUnits()` Returns the value of the 'volumeUnits' attribute of this `Model`.
`boolean`	`hasRequiredElements()` Predicate returning `true` if all the required elements for this `Model` object have been set.
`boolean`	`isPopulatedListFormulaUnitsData()` Predicate returning `true` if the list of FormulaUnitsData is populated.
`boolean`	`isSetAreaUnits()` Predicate returning `true` if this `Model`'s 'areaUnits' attribute is set.
`boolean`	`isSetConversionFactor()` Predicate returning `true` if this `Model`'s 'conversionFactor' attribute is set.
`boolean`	`isSetExtentUnits()` Predicate returning `true` if this `Model`'s 'extentUnits' attribute is set.
`boolean`	`isSetId()` Predicate returning `true` if this `Model`'s 'id' attribute is set.
`boolean`	`isSetLengthUnits()` Predicate returning `true` if this `Model`'s 'lengthUnits' attribute is set.
`boolean`	`isSetName()` Predicate returning `true` if this `Model`'s 'name' attribute is set.
`boolean`	`isSetSubstanceUnits()` Predicate returning `true` if this `Model`'s 'substanceUnits' attribute is set.
`boolean`	`isSetTimeUnits()` Predicate returning `true` if this `Model`'s 'timeUnits' attribute is set.
`boolean`	`isSetVolumeUnits()` Predicate returning `true` if this `Model`'s 'volumeUnits' attribute is set.
`void`	`populateListFormulaUnitsData()` Populates the list of FormulaDataUnits with the units derived for the model.
`Compartment`	`removeCompartment(long n)` Removes the nth `Compartment` object from this `Model` object and returns a pointer to it.
`Compartment`	`removeCompartment(java.lang.String sid)` Removes the `Compartment` object with the given identifier from this `Model` object and returns a pointer to it.
`CompartmentType`	`removeCompartmentType(long n)` Removes the nth `CompartmentType` object from this `Model` object and returns a pointer to it.
`CompartmentType`	`removeCompartmentType(java.lang.String sid)` Removes the `CompartmentType` object with the given identifier from this `Model` object and returns a pointer to it.
`Constraint`	`removeConstraint(long n)` Removes the nth `Constraint` object from this `Model` object and returns a pointer to it.
`Event`	`removeEvent(long n)` Removes the nth `Event` object from this `Model` object and returns a pointer to it.
`Event`	`removeEvent(java.lang.String sid)` Removes the `Event` object with the given identifier from this `Model` object and returns a pointer to it.
`int`	`removeFromParentAndDelete()` Finds this `Model`'s parent `SBMLDocument` and calls setModel(null) on it, indirectly deleting itself.
`FunctionDefinition`	`removeFunctionDefinition(long n)` Removes the nth `FunctionDefinition` object from this `Model` object and returns a pointer to it.
`FunctionDefinition`	`removeFunctionDefinition(java.lang.String sid)` Removes the `FunctionDefinition` object with the given identifier from this `Model` object and returns a pointer to it.
`InitialAssignment`	`removeInitialAssignment(long n)` Removes the nth `InitialAssignment` object from this `Model` object and returns a pointer to it.
`InitialAssignment`	`removeInitialAssignment(java.lang.String symbol)` Removes the `InitialAssignment` object with the given 'symbol' attribute from this `Model` object and returns a pointer to it.
`Parameter`	`removeParameter(long n)` Removes the nth `Parameter` object from this `Model` object and returns a pointer to it.
`Parameter`	`removeParameter(java.lang.String sid)` Removes the `Parameter` object with the given identifier from this `Model` object and returns a pointer to it.
`Reaction`	`removeReaction(long n)` Removes the nth `Reaction` object from this `Model` object and returns a pointer to it.
`Reaction`	`removeReaction(java.lang.String sid)` Removes the `Reaction` object with the given identifier from this `Model` object and returns a pointer to it.
`Rule`	`removeRule(long n)` Removes the nth `Rule` object from this `Model` object and returns a pointer to it.
`Rule`	`removeRule(java.lang.String variable)` Removes the `Rule` object with the given 'variable' attribute from this `Model` object and returns a pointer to it.
`Species`	`removeSpecies(long n)` Removes the nth `Species` object from this `Model` object and returns a pointer to it.
`Species`	`removeSpecies(java.lang.String sid)` Removes the `Species` object with the given identifier from this `Model` object and returns a pointer to it.
`SpeciesType`	`removeSpeciesType(long n)` Removes the nth `SpeciesType` object from this `Model` object and returns a pointer to it.
`SpeciesType`	`removeSpeciesType(java.lang.String sid)` Removes the `SpeciesType` object with the given identifier from this `Model` object and returns a pointer to it.
`UnitDefinition`	`removeUnitDefinition(long n)` Removes the nth `UnitDefinition` object from this `Model` object and returns a pointer to it.
`UnitDefinition`	`removeUnitDefinition(java.lang.String sid)` Removes the `UnitDefinition` object with the given identifier from this `Model` object and returns a pointer to it.
`void`	`renameIDs(SBaseList elements, IdentifierTransformer idTransformer)`
`void`	`renameSIdRefs(java.lang.String oldid, java.lang.String newid)` Renames all the `SIdRef` attributes on this element, including any found in MathML.
`void`	`renameUnitSIdRefs(java.lang.String oldid, java.lang.String newid)` Renames all the `UnitSIdRef` attributes on this element.
`int`	`setAnnotation(java.lang.String annotation)` Sets the value of the 'annotation' subelement of this SBML object to a copy of `annotation`.
`int`	`setAnnotation(XMLNode annotation)` Sets the value of the 'annotation' subelement of this SBML object to a copy of `annotation`.
`int`	`setAreaUnits(java.lang.String units)` Sets the value of the 'areaUnits' attribute of this `Model`.
`int`	`setConversionFactor(java.lang.String units)` Sets the value of the 'conversionFactor' attribute of this `Model`.
`int`	`setExtentUnits(java.lang.String units)` Sets the value of the 'extentUnits' attribute of this `Model`.
`int`	`setId(java.lang.String sid)` Sets the value of the 'id' attribute of this `Model`.
`int`	`setLengthUnits(java.lang.String units)` Sets the value of the 'lengthUnits' attribute of this `Model`.
`int`	`setName(java.lang.String name)` Sets the value of the 'name' attribute of this `Model`.
`int`	`setSubstanceUnits(java.lang.String units)` Sets the value of the 'substanceUnits' attribute of this `Model`.
`int`	`setTimeUnits(java.lang.String units)` Sets the value of the 'timeUnits' attribute of this `Model`.
`int`	`setVolumeUnits(java.lang.String units)` Sets the value of the 'volumeUnits' attribute of this `Model`.
`int`	`unsetAreaUnits()` Unsets the value of the 'areaUnits' attribute of this `Model`.
`int`	`unsetConversionFactor()` Unsets the value of the 'conversionFactor' attribute of this `Model`.
`int`	`unsetExtentUnits()` Unsets the value of the 'extentUnits' attribute of this `Model`.
`int`	`unsetId()` Unsets the value of the 'id' attribute of this `Model`.
`int`	`unsetLengthUnits()` Unsets the value of the 'lengthUnits' attribute of this `Model`.
`int`	`unsetName()` Unsets the value of the 'name' attribute of this `Model`.
`int`	`unsetSubstanceUnits()` Unsets the value of the 'substanceUnits' attribute of this `Model`.
`int`	`unsetTimeUnits()` Unsets the value of the 'timeUnits' attribute of this `Model`.
`int`	`unsetVolumeUnits()` Unsets the value of the 'volumeUnits' attribute of this `Model`.

Methods inherited from class org.sbml.libsbml.SBase
addCVTerm, addCVTerm, appendNotes, appendNotes, disablePackage, enablePackage, equals, getAncestorOfType, getAncestorOfType, getAnnotation, getAnnotationString, getColumn, getCVTerm, getCVTerms, getLevel, getLine, getListOfAllElements, getListOfAllElements, getListOfAllElementsFromPlugins, getListOfAllElementsFromPlugins, getMetaId, getModel, getModelHistory, getNamespaces, getNotes, getNotesString, getNumCVTerms, getNumPlugins, getPackageName, getPackageVersion, getParentSBMLObject, getPlugin, getPlugin, getPrefix, getResourceBiologicalQualifier, getResourceModelQualifier, getSBMLDocument, getSBOTerm, getSBOTermAsURL, getSBOTermID, getURI, getVersion, hashCode, hasValidLevelVersionNamespaceCombination, isPackageEnabled, isPackageURIEnabled, isSetAnnotation, isSetMetaId, isSetModelHistory, isSetNotes, isSetSBOTerm, matchesRequiredSBMLNamespacesForAddition, matchesSBMLNamespaces, removeTopLevelAnnotationElement, removeTopLevelAnnotationElement, removeTopLevelAnnotationElement, renameMetaIdRefs, replaceTopLevelAnnotationElement, replaceTopLevelAnnotationElement, setMetaId, setModelHistory, setNamespaces, setNotes, setNotes, setNotes, setSBOTerm, setSBOTerm, toSBML, toXMLNode, unsetAnnotation, unsetCVTerms, unsetMetaId, unsetModelHistory, unsetNotes, unsetSBOTerm

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Model
```
public Model(long level,
     long version)
      throws SBMLConstructorException
```
    Creates a new Model using the given SBML level and version values.
    
    Parameters:
    level - a long integer, the SBML Level to assign to this Model
    version - a long integer, the SBML Version to assign to this Model
    
    Throws:
    
    SBMLConstructorException - Thrown if the given level and version combination, or this kind of SBML object, are either invalid or mismatched with respect to the parent SBMLDocument object.
    
    "Note:"
    
    Upon the addition of a Model object to an SBMLDocument (e.g., using SBMLDocument.setModel(Model m)), the SBML Level, SBML Version and XML namespace of the document override the values used when creating the Model object via this constructor. This is necessary to ensure that an SBML document is a consistent structure. Nevertheless, the ability to supply the values at the time of creation of a Model is an important aid to producing valid SBML. Knowledge of the intented SBML Level and Version determine whether it is valid to assign a particular value to an attribute, or whether it is valid to add an object to an existing SBMLDocument.
  - Model
```
public Model(Model orig)
      throws SBMLConstructorException
```
    Copy constructor creates a (deep) copy of the given Model object.
    
    Parameters:
    orig - the object to copy.
    
    Throws:
    
    SBMLConstructorException - Thrown if the argument orig is null.
  - Model
```
public Model(SBMLNamespaces sbmlns)
      throws SBMLConstructorException
```
    Creates a new Model using the given SBMLNamespaces object sbmlns.
    
    The SBMLNamespaces object encapsulates SBML Level/Version/namespaces information. It is used to communicate the SBML Level, Version, and (in Level 3) packages used in addition to SBML Level 3 Core. A common approach to using libSBML's SBMLNamespaces facilities is to create an SBMLNamespaces object somewhere in a program once, then hand that object as needed to object constructors that accept SBMLNamespaces as arguments.
    
    Parameters:
    sbmlns - an SBMLNamespaces object.
    
    Throws:
    
    SBMLConstructorException - Thrown if the given level and version combination, or this kind of SBML object, are either invalid or mismatched with respect to the parent SBMLDocument object.
    
    "Note:"
    
    Upon the addition of a Model object to an SBMLDocument (e.g., using SBMLDocument.setModel(Model m)), the SBML Level, SBML Version and XML namespace of the document override the values used when creating the Model object via this constructor. This is necessary to ensure that an SBML document is a consistent structure. Nevertheless, the ability to supply the values at the time of creation of a Model is an important aid to producing valid SBML. Knowledge of the intented SBML Level and Version determine whether it is valid to assign a particular value to an attribute, or whether it is valid to add an object to an existing SBMLDocument.
- Method Detail
  - addCompartment
```
public int addCompartment(Compartment c)
```
    Adds a copy of the given Compartment object to this Model.
    Parameters:
    c - the Compartment object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createCompartment()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addCompartmentType
```
public int addCompartmentType(CompartmentType ct)
```
    Adds a copy of the given CompartmentType object to this Model.
    Parameters:
    ct - the CompartmentType object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createCompartmentType()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
    , The CompartmentType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - addConstraint
```
public int addConstraint(Constraint c)
```
    Adds a copy of the given Constraint object to this Model.
    Parameters:
    c - the Constraint object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createConstraint()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addEvent
```
public int addEvent(Event e)
```
    Adds a copy of the given Event object to this Model.
    Parameters:
    e - the Event object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createEvent()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addFunctionDefinition
```
public int addFunctionDefinition(FunctionDefinition fd)
```
    Adds a copy of the given FunctionDefinition object to this Model.
    Parameters:
    fd - the FunctionDefinition to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createFunctionDefinition()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addInitialAssignment
```
public int addInitialAssignment(InitialAssignment ia)
```
    Adds a copy of the given InitialAssignment object to this Model.
    Parameters:
    ia - the InitialAssignment object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createInitialAssignment()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addParameter
```
public int addParameter(Parameter p)
```
    Adds a copy of the given Parameter object to this Model.
    Parameters:
    p - the Parameter object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createParameter()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addReaction
```
public int addReaction(Reaction r)
```
    Adds a copy of the given Reaction object to this Model.
    Parameters:
    r - the Reaction object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createReaction()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addRule
```
public int addRule(Rule r)
```
    Adds a copy of the given Rule object to this Model.
    Parameters:
    r - the Rule object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createAlgebraicRule(), Model.createAssignmentRule(), Model.createRateRule()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addSpecies
```
public int addSpecies(Species s)
```
    Adds a copy of the given Species object to this Model.
    Parameters:
    s - the Species object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createSpecies()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - addSpeciesType
```
public int addSpeciesType(SpeciesType st)
```
    Adds a copy of the given SpeciesType object to this Model.
    Parameters:
    st - the SpeciesType object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createSpeciesType()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
    , The SpeciesType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - addUnitDefinition
```
public int addUnitDefinition(UnitDefinition ud)
```
    Adds a copy of the given UnitDefinition object to this Model.
    Parameters:
    ud - the UnitDefinition object to add
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_LEVEL_MISMATCH
    LIBSBML_VERSION_MISMATCH
    LIBSBML_DUPLICATE_OBJECT_ID
    LIBSBML_INVALID_OBJECT
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.createUnitDefinition()
    "Note:"
    
    This method should be used with some caution. The fact that this method copies the object passed to it means that the caller will be left holding a physically different object instance than the one contained inside this object. Changes made to the original object instance (such as resetting attribute values) will not affect the instance in this object. In addition, the caller should make sure to free the original object if it is no longer being used, or else a memory leak will result. Please see other methods on this class (particularly a corresponding method whose name begins with the word create) for alternatives that do not lead to these issues.
  - appendAnnotation
```
public int appendAnnotation(java.lang.String annotation)
```
    Appends annotation content to any existing content in the 'annotation' subelement of this object.
    The content in annotation is copied. Unlike setAnnotation(), this method allows other annotations to be preserved when an application adds its own data.
    Overrides:
    
    appendAnnotation in class SBase
    
    Parameters:
    annotation - an XML string that is to be copied and appended to the content of the 'annotation' subelement of this object
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.setAnnotation(String annotation)
  - appendAnnotation
```
public int appendAnnotation(XMLNode annotation)
```
    Appends annotation content to any existing content in the 'annotation' subelement of this object.
    The content in annotation is copied. Unlike setAnnotation(), this method allows other annotations to be preserved when an application adds its own data.
    Overrides:
    
    appendAnnotation in class SBase
    
    Parameters:
    annotation - an XML structure that is to be copied and appended to the content of the 'annotation' subelement of this object
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.setAnnotation(XMLNode annotation)
  - appendFrom
```
public int appendFrom(Model model)
```
    Takes the contents of the passed-in Model, makes copies of everything, and appends those copies to the appropriate places in this Model.
    This method also calls the appendFrom method on all libSBML plug-in objects.
    SBML Level 3 consists of a Core definition that can be extended via optional SBML Level 3 packages. A given model may indicate that it uses one or more SBML packages, and likewise, a software tool may be able to support one or more packages. LibSBML does not come preconfigured with all possible packages included and enabled, in part because not all package specifications have been finalized. To support the ability for software systems to enable support for the Level 3 packages they choose, libSBML features a plug-in mechanism. Each SBML Level 3 package is implemented in a separate code plug-in that can be enabled by the application to support working with that SBML package. A given SBML model may thus contain not only objects defined by SBML Level 3 Core, but also objects created by libSBML plug-ins supporting additional Level 3 packages.
    
    Parameters:
    model - the Model to merge with this one.
  - cloneObject
```
public Model cloneObject()
```
    Creates and returns a deep copy of this Model object.
    
    Overrides:
    
    cloneObject in class SBase
    
    Returns:
    a (deep) copy of this Model.
  - createAlgebraicRule
```
public AlgebraicRule createAlgebraicRule()
```
    Creates a new AlgebraicRule inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the AlgebraicRule object created
    See Also:
    Model.addRule(Rule r)
  - createAssignmentRule
```
public AssignmentRule createAssignmentRule()
```
    Creates a new AssignmentRule inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the AssignmentRule object created
    See Also:
    Model.addRule(Rule r)
  - createCompartment
```
public Compartment createCompartment()
```
    Creates a new Compartment inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the Compartment object created
    See Also:
    Model.addCompartment(Compartment c)
  - createCompartmentType
```
public CompartmentType createCompartmentType()
```
    Creates a new CompartmentType inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the CompartmentType object created
    See Also:
    Model.addCompartmentType(CompartmentType ct)
    "Note:"
    
    The CompartmentType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - createConstraint
```
public Constraint createConstraint()
```
    Creates a new Constraint inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the Constraint object created
    See Also:
    Model.addConstraint(Constraint c)
  - createDelay
```
public Delay createDelay()
```
    Creates a new Delay inside the last Event object created in this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the last Event object in this model was created is not significant. It could have been created in a variety of ways, for example by using createEvent(). If no Event object exists in this Model object, a new Delay is not created and null is returned instead.
    
    Returns:
    the Delay object created
  - createEvent
```
public Event createEvent()
```
    Creates a new Event inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the Event object created
  - createEventAssignment
```
public EventAssignment createEventAssignment()
```
    Creates a new EventAssignment inside the last Event object created in this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the last Event object in this model was created is not significant. It could have been created in a variety of ways, for example by using createEvent(). If no Event object exists in this Model object, a new EventAssignment is not created and null is returned instead.
    
    Returns:
    the EventAssignment object created
  - createFunctionDefinition
```
public FunctionDefinition createFunctionDefinition()
```
    Creates a new FunctionDefinition inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the FunctionDefinition object created
    See Also:
    Model.addFunctionDefinition(FunctionDefinition fd)
  - createInitialAssignment
```
public InitialAssignment createInitialAssignment()
```
    Creates a new InitialAssignment inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the InitialAssignment object created
    See Also:
    Model.addInitialAssignment(InitialAssignment ia)
  - createKineticLaw
```
public KineticLaw createKineticLaw()
```
    Creates a new KineticLaw inside the last Reaction object created in this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the last Reaction object was created and added to this Model is not significant. It could have been created in a variety of ways, for example using createReaction(). If a Reaction does not exist for this model, or a Reaction exists but already has a KineticLaw, a new KineticLaw is not created and null is returned instead.
    
    Returns:
    the KineticLaw object created
  - createKineticLawLocalParameter
```
public LocalParameter createKineticLawLocalParameter()
```
    Creates a new LocalParameter inside the KineticLaw object of the last Reaction created inside this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The last KineticLaw object in this Model could have been created in a variety of ways. For example, it could have been added using createKineticLaw(), or it could be the result of using Reaction.createKineticLaw() on the Reaction object created by a createReaction(). If a Reaction does not exist for this model, or the last Reaction does not contain a KineticLaw object, a new Parameter is not created and null is returned instead.
    
    Returns:
    the Parameter object created
  - createKineticLawParameter
```
public Parameter createKineticLawParameter()
```
    Creates a new local Parameter inside the KineticLaw object of the last Reaction created inside this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The last KineticLaw object in this Model could have been created in a variety of ways. For example, it could have been added using createKineticLaw(), or it could be the result of using Reaction.createKineticLaw() on the Reaction object created by a createReaction(). If a Reaction does not exist for this model, or the last Reaction does not contain a KineticLaw object, a new Parameter is not created and null is returned instead.
    
    Returns:
    the Parameter object created
  - createModifier
```
public ModifierSpeciesReference createModifier()
```
    Creates a new ModifierSpeciesReference object for a modifier species inside the last Reaction object in this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the last Reaction object was created and added to this Model is not significant. It could have been created in a variety of ways, for example using createReaction(). If a Reaction does not exist for this model, a new ModifierSpeciesReference is not created and null is returned instead.
    
    Returns:
    the SpeciesReference object created
  - createParameter
```
public Parameter createParameter()
```
    Creates a new Parameter inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the Parameter object created
    See Also:
    Model.addParameter(Parameter p)
  - createProduct
```
public SpeciesReference createProduct()
```
    Creates a new SpeciesReference object for a product inside the last Reaction object in this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the last Reaction object was created and added to this Model is not significant. It could have been created in a variety of ways, for example using createReaction(). If a Reaction does not exist for this model, a new SpeciesReference is not created and null is returned instead.
    
    Returns:
    the SpeciesReference object created
  - createRateRule
```
public RateRule createRateRule()
```
    Creates a new RateRule inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the RateRule object created
    See Also:
    Model.addRule(Rule r)
  - createReactant
```
public SpeciesReference createReactant()
```
    Creates a new SpeciesReference object for a reactant inside the last Reaction object in this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the last Reaction object was created and added to this Model is not significant. It could have been created in a variety of ways, for example using createReaction(). If a Reaction does not exist for this model, a new SpeciesReference is not created and null is returned instead.
    
    Returns:
    the SpeciesReference object created
  - createReaction
```
public Reaction createReaction()
```
    Creates a new Reaction inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the Reaction object created
    See Also:
    Model.addReaction(Reaction r)
  - createSpecies
```
public Species createSpecies()
```
    Creates a new Species inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the Species object created
    See Also:
    Model.addSpecies(Species s)
  - createSpeciesType
```
public SpeciesType createSpeciesType()
```
    Creates a new SpeciesType inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the SpeciesType object created
    See Also:
    Model.addSpeciesType(SpeciesType st)
    "Note:"
    
    The SpeciesType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - createTrigger
```
public Trigger createTrigger()
```
    Creates a new Trigger inside the last Event object created in this Model, and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the last Event object in this model was created is not significant. It could have been created in a variety of ways, for example by using createEvent(). If no Event object exists in this Model object, a new Trigger is not created and null is returned instead.
    
    Returns:
    the Trigger object created
  - createUnit
```
public Unit createUnit()
```
    Creates a new Unit object within the last UnitDefinition object created in this model and returns a pointer to it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    The mechanism by which the UnitDefinition was created is not significant. If a UnitDefinition object does not exist in this model, a new Unit is not created and null is returned instead.
    
    Returns:
    the Unit object created
    See Also:
    Model.addUnitDefinition(UnitDefinition ud)
  - createUnitDefinition
```
public UnitDefinition createUnitDefinition()
```
    Creates a new UnitDefinition inside this Model and returns it.
    The SBML Level and Version of the enclosing Model object, as well as any SBML package namespaces, are used to initialize this object's corresponding attributes.
    
    Returns:
    the UnitDefinition object created
    See Also:
    Model.addUnitDefinition(UnitDefinition ud)
  - delete
```
public void delete()
```
    Explicitly deletes the underlying native object.
    In general, application software will not need to call this method directly. The Java language binding for libSBML is implemented as a language wrapper that provides a Java interface to libSBML's underlying C++/C code. Some of the Java methods return objects that are linked to objects created not by Java code, but by C++ code. The Java objects wrapped around them will be deleted when the garbage collector invokes the corresponding C++ finalize() methods for the objects. The finalize() methods in turn call the Model.delete() method on the libSBML object.
    This method is exposed in case calling programs want to ensure that the underlying object is freed immediately, and not at some arbitrary time determined by the Java garbage collector. In normal usage, callers do not need to invoke Model.delete() themselves.
    
    Overrides:
    
    delete in class SBase
  - getAreaUnits
```
public java.lang.String getAreaUnits()
```
    Returns the value of the 'areaUnits' attribute of this Model.
    
    Returns:
    the areaUnits of this Model.
    "Note:"
    
    The 'areaUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - getAssignmentRule
```
public AssignmentRule getAssignmentRule(java.lang.String variable)
```
    Get a Rule object based on the variable to which it assigns a value.
    
    Returns:
    the Rule in this Model with the given 'variable' attribute value or null if no such Rule exists.
  - getAssignmentRuleByVariable
```
public AssignmentRule getAssignmentRuleByVariable(java.lang.String variable)
```
    Get a Rule object based on the variable to which it assigns a value.
    
    Returns:
    the Rule in this Model with the given 'variable' attribute value or null if no such Rule exists.
  - getCompartment
```
public Compartment getCompartment(long n)
```
    Get the nth Compartment object in this Model.
    
    Returns:
    the nth Compartment of this Model.
  - getCompartment
```
public Compartment getCompartment(java.lang.String sid)
```
    Get a Compartment object based on its identifier.
    
    Returns:
    the Compartment in this Model with the identifier sid or null if no such Compartment exists.
  - getCompartmentType
```
public CompartmentType getCompartmentType(long n)
```
    Get the nth CompartmentType object in this Model.
    
    Returns:
    the nth CompartmentType of this Model.
    "Note:"
    
    The CompartmentType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getCompartmentType
```
public CompartmentType getCompartmentType(java.lang.String sid)
```
    Get a CompartmentType object based on its identifier.
    
    Returns:
    the CompartmentType in this Model with the identifier sid or null if no such CompartmentType exists.
    "Note:"
    
    The CompartmentType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getConstraint
```
public Constraint getConstraint(long n)
```
    Get the nth Constraint object in this Model.
    
    Returns:
    the nth Constraint of this Model.
  - getConversionFactor
```
public java.lang.String getConversionFactor()
```
    Returns the value of the 'conversionFactor' attribute of this Model.
    
    Returns:
    the conversionFactor of this Model.
    "Note:"
    
    The 'conversionFactor' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - getElementByMetaId
```
public SBase getElementByMetaId(java.lang.String metaid)
```
    Returns the first child element it can find with the given metaid, or null if no such object is found.
    
    Overrides:
    
    getElementByMetaId in class SBase
    
    Parameters:
    metaid - string representing the metaid of objects to find
    
    Returns:
    pointer to the first element found with the given metaid.
  - getElementBySId
```
public SBase getElementBySId(java.lang.String id)
```
    Returns the first child element found that has the given id in the model-wide SId namespace, or null if no such object is found.
    
    Overrides:
    
    getElementBySId in class SBase
    
    Parameters:
    id - string representing the id of objects to find.
    
    Returns:
    pointer to the first element found with the given id.
  - getElementName
```
public java.lang.String getElementName()
```
    Returns the XML element name of this object, which for Model, is always 'model'.
    
    Overrides:
    
    getElementName in class SBase
    
    Returns:
    the name of this element, i.e., 'model'.
  - getEvent
```
public Event getEvent(long n)
```
    Get the nth Event object in this Model.
    
    Returns:
    the nth Event of this Model.
  - getEvent
```
public Event getEvent(java.lang.String sid)
```
    Get an Event object based on its identifier.
    
    Returns:
    the Event in this Model with the identifier sid or null if no such Event exists.
  - getExtentUnits
```
public java.lang.String getExtentUnits()
```
    Returns the value of the 'extentUnits' attribute of this Model.
    
    Returns:
    the extentUnits of this Model.
    "Note:"
    
    The 'extentUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - getFunctionDefinition
```
public FunctionDefinition getFunctionDefinition(long n)
```
    Get the nth FunctionDefinitions object in this Model.
    
    Returns:
    the nth FunctionDefinition of this Model.
  - getFunctionDefinition
```
public FunctionDefinition getFunctionDefinition(java.lang.String sid)
```
    Get a FunctionDefinition object based on its identifier.
    
    Returns:
    the FunctionDefinition in this Model with the identifier sid or null if no such FunctionDefinition exists.
  - getId
```
public java.lang.String getId()
```
    Returns the value of the 'id' attribute of this Model.
    
    Overrides:
    
    getId in class SBase
    
    Returns:
    the id of this Model.
  - getInitialAssignment
```
public InitialAssignment getInitialAssignment(long n)
```
    Get the nth InitialAssignment object in this Model.
    
    Returns:
    the nth InitialAssignment of this Model.
  - getInitialAssignment
```
public InitialAssignment getInitialAssignment(java.lang.String symbol)
```
    Get an InitialAssignment object based on the symbol to which it assigns a value.
    
    Returns:
    the InitialAssignment in this Model with the given 'symbol' attribute value or null if no such InitialAssignment exists.
  - getInitialAssignmentBySymbol
```
public InitialAssignment getInitialAssignmentBySymbol(java.lang.String symbol)
```
    Get an InitialAssignment object based on the symbol to which it assigns a value.
    
    Returns:
    the InitialAssignment in this Model with the given 'symbol' attribute value or null if no such InitialAssignment exists.
  - getLengthUnits
```
public java.lang.String getLengthUnits()
```
    Returns the value of the 'lengthUnits' attribute of this Model.
    
    Returns:
    the lengthUnits of this Model.
    "Note:"
    
    The 'lengthUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - getListOfCompartments
```
public ListOfCompartments getListOfCompartments()
```
    Get the ListOfCompartments object in this Model.
    
    Returns:
    the list of Compartments for this Model.
  - getListOfCompartmentTypes
```
public ListOfCompartmentTypes getListOfCompartmentTypes()
```
    Get the ListOfCompartmentTypes object in this Model.
    
    Returns:
    the list of CompartmentTypes for this Model.
    "Note:"
    
    The CompartmentType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getListOfConstraints
```
public ListOfConstraints getListOfConstraints()
```
    Get the ListOfConstraints object in this Model.
    
    Returns:
    the list of Constraints for this Model.
  - getListOfEvents
```
public ListOfEvents getListOfEvents()
```
    Get the ListOfEvents object in this Model.
    
    Returns:
    the list of Events for this Model.
  - getListOfFunctionDefinitions
```
public ListOfFunctionDefinitions getListOfFunctionDefinitions()
```
    Get the ListOfFunctionDefinitions object in this Model.
    
    Returns:
    the list of FunctionDefinitions for this Model.
  - getListOfInitialAssignments
```
public ListOfInitialAssignments getListOfInitialAssignments()
```
    Get the ListOfInitialAssignments object in this Model.
    
    Returns:
    the list of InitialAssignments for this Model.
  - getListOfParameters
```
public ListOfParameters getListOfParameters()
```
    Get the ListOfParameters object in this Model.
    
    Returns:
    the list of Parameters for this Model.
  - getListOfReactions
```
public ListOfReactions getListOfReactions()
```
    Get the ListOfReactions object in this Model.
    
    Returns:
    the list of Reactions for this Model.
  - getListOfRules
```
public ListOfRules getListOfRules()
```
    Get the ListOfRules object in this Model.
    
    Returns:
    the list of Rules for this Model.
  - getListOfSpecies
```
public ListOfSpecies getListOfSpecies()
```
    Get the ListOfSpecies object in this Model.
    
    Returns:
    the list of Species for this Model.
  - getListOfSpeciesTypes
```
public ListOfSpeciesTypes getListOfSpeciesTypes()
```
    Get the ListOfSpeciesTypes object in this Model.
    
    Returns:
    the list of SpeciesTypes for this Model.
    "Note:"
    
    The SpeciesType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getListOfUnitDefinitions
```
public ListOfUnitDefinitions getListOfUnitDefinitions()
```
    Get the ListOfUnitDefinitions object in this Model.
    
    Returns:
    the list of UnitDefinitions for this Model.
  - getModifierSpeciesReference
```
public ModifierSpeciesReference getModifierSpeciesReference(java.lang.String sid)
```
    Get a ModifierSpeciesReference object based on its identifier.
    
    Returns:
    the ModifierSpeciesReference in this Model with the identifier sid or null if no such ModifierSpeciesReference exists.
  - getName
```
public java.lang.String getName()
```
    Returns the value of the 'name' attribute of this Model.
    
    Overrides:
    
    getName in class SBase
    
    Returns:
    the name of this Model.
  - getNumCompartments
```
public long getNumCompartments()
```
    Get the number of Compartment objects in this Model.
    
    Returns:
    the number of Compartments in this Model.
  - getNumCompartmentTypes
```
public long getNumCompartmentTypes()
```
    Get the number of CompartmentType objects in this Model.
    
    Returns:
    the number of CompartmentTypes in this Model.
    "Note:"
    
    The CompartmentType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getNumConstraints
```
public long getNumConstraints()
```
    Get the number of Constraint objects in this Model.
    
    Returns:
    the number of Constraints in this Model.
  - getNumEvents
```
public long getNumEvents()
```
    Get the number of Event objects in this Model.
    
    Returns:
    the number of Events in this Model.
  - getNumFunctionDefinitions
```
public long getNumFunctionDefinitions()
```
    Get the number of FunctionDefinition objects in this Model.
    
    Returns:
    the number of FunctionDefinitions in this Model.
  - getNumInitialAssignments
```
public long getNumInitialAssignments()
```
    Get the number of InitialAssignment objects in this Model.
    
    Returns:
    the number of InitialAssignments in this Model.
  - getNumParameters
```
public long getNumParameters()
```
    Get the number of Parameter objects in this Model.
    
    Returns:
    the number of Parameters in this Model. Parameters defined in KineticLaws are not included.
  - getNumReactions
```
public long getNumReactions()
```
    Get the number of Reaction objects in this Model.
    
    Returns:
    the number of Reactions in this Model.
  - getNumRules
```
public long getNumRules()
```
    Get the number of Rule objects in this Model.
    
    Returns:
    the number of Rules in this Model.
  - getNumSpecies
```
public long getNumSpecies()
```
    Get the number of Specie objects in this Model.
    
    Returns:
    the number of Species in this Model.
  - getNumSpeciesTypes
```
public long getNumSpeciesTypes()
```
    Get the number of SpeciesType objects in this Model.
    
    Returns:
    the number of SpeciesTypes in this Model.
    "Note:"
    
    The SpeciesType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getNumSpeciesWithBoundaryCondition
```
public long getNumSpeciesWithBoundaryCondition()
```
    Get the number of Species in this Model having their 'boundaryCondition' attribute value set to true.
    
    Returns:
    the number of Species in this Model with boundaryCondition set to true.
  - getNumUnitDefinitions
```
public long getNumUnitDefinitions()
```
    Get the number of UnitDefinition objects in this Model.
    
    Returns:
    the number of UnitDefinitions in this Model.
  - getParameter
```
public Parameter getParameter(long n)
```
    Get the nth Parameter object in this Model.
    
    Returns:
    the nth Parameter of this Model.
  - getParameter
```
public Parameter getParameter(java.lang.String sid)
```
    Get a Parameter object based on its identifier.
    
    Returns:
    the Parameter in this Model with the identifier sid or null if no such Parameter exists.
  - getRateRule
```
public RateRule getRateRule(java.lang.String variable)
```
    Get a Rule object based on the variable to which it assigns a value.
    
    Returns:
    the Rule in this Model with the given 'variable' attribute value or null if no such Rule exists.
  - getRateRuleByVariable
```
public RateRule getRateRuleByVariable(java.lang.String variable)
```
    Get a Rule object based on the variable to which it assigns a value.
    
    Returns:
    the Rule in this Model with the given 'variable' attribute value or null if no such Rule exists.
  - getReaction
```
public Reaction getReaction(long n)
```
    Get the nth Reaction object in this Model.
    
    Returns:
    the nth Reaction of this Model.
  - getReaction
```
public Reaction getReaction(java.lang.String sid)
```
    Get a Reaction object based on its identifier.
    
    Returns:
    the Reaction in this Model with the identifier sid or null if no such Reaction exists.
  - getRule
```
public Rule getRule(long n)
```
    Get the nth Rule object in this Model.
    
    Returns:
    the nth Rule of this Model.
  - getRule
```
public Rule getRule(java.lang.String variable)
```
    Get a Rule object based on the variable to which it assigns a value.
    
    Returns:
    the Rule in this Model with the given 'variable' attribute value or null if no such Rule exists.
  - getRuleByVariable
```
public Rule getRuleByVariable(java.lang.String variable)
```
    Get a Rule object based on the variable to which it assigns a value.
    
    Returns:
    the Rule in this Model with the given 'variable' attribute value or null if no such Rule exists.
  - getSpecies
```
public Species getSpecies(long n)
```
    Get the nth Species object in this Model.
    
    Returns:
    the nth Species of this Model.
  - getSpecies
```
public Species getSpecies(java.lang.String sid)
```
    Get a Species object based on its identifier.
    
    Returns:
    the Species in this Model with the identifier sid or null if no such Species exists.
  - getSpeciesReference
```
public SpeciesReference getSpeciesReference(java.lang.String sid)
```
    Get a SpeciesReference object based on its identifier.
    
    Returns:
    the SpeciesReference in this Model with the identifier sid or null if no such SpeciesReference exists.
  - getSpeciesType
```
public SpeciesType getSpeciesType(long n)
```
    Get the nth SpeciesType object in this Model.
    
    Returns:
    the nth SpeciesType of this Model.
    "Note:"
    
    The SpeciesType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getSpeciesType
```
public SpeciesType getSpeciesType(java.lang.String sid)
```
    Get a SpeciesType object based on its identifier.
    
    Returns:
    the SpeciesType in this Model with the identifier sid or null if no such SpeciesType exists.
    "Note:"
    
    The SpeciesType object class is only available in SBML Level 2 Versions 2&ndash4. It is not available in Level 1 nor Level 3.
  - getSubstanceUnits
```
public java.lang.String getSubstanceUnits()
```
    Returns the value of the 'substanceUnits' attribute of this Model.
    
    Returns:
    the substanceUnits of this Model.
    "Note:"
    
    The 'substanceUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - getTimeUnits
```
public java.lang.String getTimeUnits()
```
    Returns the value of the 'timeUnits' attribute of this Model.
    
    Returns:
    the timeUnits of this Model.
    "Note:"
    
    The 'timeUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - getTypeCode
```
public int getTypeCode()
```
    Returns the libSBML type code for this SBML object.
    
    LibSBML attaches an identifying code to every kind of SBML object. These are integer constants known as SBML type codes. The names of all the codes begin with the characters &ldquoSBML_&rdquo. In the Java language interface for libSBML, the type codes are defined as static integer constants in the interface class libsbmlConstants. Note that different Level 3 package plug-ins may use overlapping type codes to identify the package to which a given object belongs, call the getPackageName() method on the object.
    
    Overrides:
    
    getTypeCode in class SBase
    
    Returns:
    the SBML type code for this object: SBML_MODEL (default).
    
    See Also:
    Model.getElementName(), SBase.getPackageName()
    "Warning:"
    
    The specific integer values of the possible type codes may be reused by different Level 3 package plug-ins. Thus, to identifiy the correct code, it is necessary to invoke both getTypeCode() and getPackageName().
  - getUnitDefinition
```
public UnitDefinition getUnitDefinition(long n)
```
    Get the nth UnitDefinition object in this Model.
    
    Returns:
    the nth UnitDefinition of this Model.
  - getUnitDefinition
```
public UnitDefinition getUnitDefinition(java.lang.String sid)
```
    Get a UnitDefinition based on its identifier.
    
    Returns:
    the UnitDefinition in this Model with the identifier sid or null if no such UnitDefinition exists.
  - getVolumeUnits
```
public java.lang.String getVolumeUnits()
```
    Returns the value of the 'volumeUnits' attribute of this Model.
    
    Returns:
    the volumeUnits of this Model.
    "Note:"
    
    The 'volumeUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - hasRequiredElements
```
public boolean hasRequiredElements()
```
    Predicate returning true if all the required elements for this Model object have been set.
    
    Overrides:
    
    hasRequiredElements in class SBase
    
    Returns:
    a boolean value indicating whether all the required elements for this object have been defined.
    "Note:"
    
    The required elements for a Model object are: listOfCompartments (L1 only) listOfSpecies (L1V1 only) listOfReactions(L1V1 only)
  - isPopulatedListFormulaUnitsData
```
public boolean isPopulatedListFormulaUnitsData()
```
    Predicate returning true if the list of FormulaUnitsData is populated.
    
    Returns:
    true if the list of FormulaUnitsData is populated, false otherwise.
  - isSetAreaUnits
```
public boolean isSetAreaUnits()
```
    Predicate returning true if this Model's 'areaUnits' attribute is set.
    
    Returns:
    true if the 'areaUnits' attribute of this Model is set, false otherwise.
    "Note:"
    
    The 'areaUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - isSetConversionFactor
```
public boolean isSetConversionFactor()
```
    Predicate returning true if this Model's 'conversionFactor' attribute is set.
    
    Returns:
    true if the 'conversionFactor' attribute of this Model is set, false otherwise.
    "Note:"
    
    The 'conversionFactor' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - isSetExtentUnits
```
public boolean isSetExtentUnits()
```
    Predicate returning true if this Model's 'extentUnits' attribute is set.
    
    Returns:
    true if the 'extentUnits' attribute of this Model is set, false otherwise.
    "Note:"
    
    The 'extentUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - isSetId
```
public boolean isSetId()
```
    Predicate returning true if this Model's 'id' attribute is set.
    
    Overrides:
    
    isSetId in class SBase
    
    Returns:
    true if the 'id' attribute of this Model is set, false otherwise.
  - isSetLengthUnits
```
public boolean isSetLengthUnits()
```
    Predicate returning true if this Model's 'lengthUnits' attribute is set.
    
    Returns:
    true if the 'lengthUnits' attribute of this Model is set, false otherwise.
    "Note:"
    
    The 'lengthUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - isSetName
```
public boolean isSetName()
```
    Predicate returning true if this Model's 'name' attribute is set.
    
    Overrides:
    
    isSetName in class SBase
    
    Returns:
    true if the 'name' attribute of this Model is set, false otherwise.
  - isSetSubstanceUnits
```
public boolean isSetSubstanceUnits()
```
    Predicate returning true if this Model's 'substanceUnits' attribute is set.
    
    Returns:
    true if the 'substanceUnits' attribute of this Model is set, false otherwise.
    "Note:"
    
    The 'substanceUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - isSetTimeUnits
```
public boolean isSetTimeUnits()
```
    Predicate returning true if this Model's 'timeUnits' attribute is set.
    
    Returns:
    true if the 'timeUnits' attribute of this Model is set, false otherwise.
    "Note:"
    
    The 'substanceUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - isSetVolumeUnits
```
public boolean isSetVolumeUnits()
```
    Predicate returning true if this Model's 'volumeUnits' attribute is set.
    
    Returns:
    true if the 'volumeUnits' attribute of this Model is set, false otherwise.
    "Note:"
    
    The 'volumeUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - populateListFormulaUnitsData
```
public void populateListFormulaUnitsData()
```
    Populates the list of FormulaDataUnits with the units derived for the model. The list contains elements of class FormulaUnitsData.
    The first element of the list refers to the default units of 'substance per time' derived from the model and has the unitReferenceId 'subs_per_time'. This facilitates the comparison of units derived from mathematical formula with the expected units.
    The next elements of the list record the units of the compartments and species established from either explicitly declared or default units.
    The next elements record the units of any parameters.
    Subsequent elements of the list record the units derived for each mathematical expression encountered within the model.
    
    "Note:"
    
    This function is utilised by the Unit Consistency Validator. The list is populated prior to running the validation and thus the consistency of units can be checked by accessing the members of the list and comparing the appropriate data.
  - removeCompartment
```
public Compartment removeCompartment(long n)
```
    Removes the nth Compartment object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the Compartment object to remove
    
    Returns:
    the Compartment object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeCompartment
```
public Compartment removeCompartment(java.lang.String sid)
```
    Removes the Compartment object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the Compartment objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the Compartment object to remove
    
    Returns:
    the Compartment object removed. As mentioned above, the caller owns the returned object. null is returned if no Compartment object with the identifier exists in this Model object.
  - removeCompartmentType
```
public CompartmentType removeCompartmentType(long n)
```
    Removes the nth CompartmentType object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the CompartmentType object to remove
    
    Returns:
    the ComapartmentType object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeCompartmentType
```
public CompartmentType removeCompartmentType(java.lang.String sid)
```
    Removes the CompartmentType object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the CompartmentType objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the object to remove
    
    Returns:
    the CompartmentType object removed. As mentioned above, the caller owns the returned object. null is returned if no CompartmentType object with the identifier exists in this Model object.
  - removeConstraint
```
public Constraint removeConstraint(long n)
```
    Removes the nth Constraint object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the Constraint object to remove
    
    Returns:
    the Constraint object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeEvent
```
public Event removeEvent(long n)
```
    Removes the nth Event object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the Event object to remove
    
    Returns:
    the Event object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeEvent
```
public Event removeEvent(java.lang.String sid)
```
    Removes the Event object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the Event objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the Event object to remove
    
    Returns:
    the Event object removed. As mentioned above, the caller owns the returned object. null is returned if no Event object with the identifier exists in this Model object.
  - removeFromParentAndDelete
```
public int removeFromParentAndDelete()
```
    Finds this Model's parent SBMLDocument and calls setModel(null) on it, indirectly deleting itself. Overridden from the SBase function since the parent is not a ListOf.
    Overrides:
    
    removeFromParentAndDelete in class SBase
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
  - removeFunctionDefinition
```
public FunctionDefinition removeFunctionDefinition(long n)
```
    Removes the nth FunctionDefinition object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the FunctionDefinition object to remove
    
    Returns:
    the FunctionDefinition object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeFunctionDefinition
```
public FunctionDefinition removeFunctionDefinition(java.lang.String sid)
```
    Removes the FunctionDefinition object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the FunctionDefinition objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the FunctionDefinition object to remove
    
    Returns:
    the FunctionDefinition object removed. As mentioned above, the caller owns the returned object. null is returned if no FunctionDefinition object with the identifier exists in this Model object.
  - removeInitialAssignment
```
public InitialAssignment removeInitialAssignment(long n)
```
    Removes the nth InitialAssignment object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the InitialAssignment object to remove
    
    Returns:
    the InitialAssignment object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeInitialAssignment
```
public InitialAssignment removeInitialAssignment(java.lang.String symbol)
```
    Removes the InitialAssignment object with the given 'symbol' attribute from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the InitialAssignment objects in this Model object have the 'symbol' attribute symbol, then null is returned.
    
    Parameters:
    symbol - the 'symbol' attribute of the InitialAssignment object to remove
    
    Returns:
    the InitialAssignment object removed. As mentioned above, the caller owns the returned object. null is returned if no InitialAssignment object with the 'symbol' attribute exists in this Model object.
  - removeParameter
```
public Parameter removeParameter(long n)
```
    Removes the nth Parameter object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the Parameter object to remove
    
    Returns:
    the Parameter object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeParameter
```
public Parameter removeParameter(java.lang.String sid)
```
    Removes the Parameter object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the Parameter objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the Parameter object to remove
    
    Returns:
    the Parameter object removed. As mentioned above, the caller owns the returned object. null is returned if no Parameter object with the identifier exists in this Model object.
  - removeReaction
```
public Reaction removeReaction(long n)
```
    Removes the nth Reaction object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the Reaction object to remove
    
    Returns:
    the Reaction object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeReaction
```
public Reaction removeReaction(java.lang.String sid)
```
    Removes the Reaction object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the Reaction objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the Reaction object to remove
    
    Returns:
    the Reaction object removed. As mentioned above, the caller owns the returned object. null is returned if no Reaction object with the identifier exists in this Model object.
  - removeRule
```
public Rule removeRule(long n)
```
    Removes the nth Rule object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the Rule object to remove
    
    Returns:
    the Rule object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeRule
```
public Rule removeRule(java.lang.String variable)
```
    Removes the Rule object with the given 'variable' attribute from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the Rule objects in this Model object have the 'variable' attribute variable, then null is returned.
    
    Parameters:
    variable - the 'variable' attribute of the Rule object to remove
    
    Returns:
    the Rule object removed. As mentioned above, the caller owns the returned object. null is returned if no Rule object with the 'variable' attribute exists in this Model object.
  - removeSpecies
```
public Species removeSpecies(long n)
```
    Removes the nth Species object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the Species object to remove
    
    Returns:
    the Species object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeSpecies
```
public Species removeSpecies(java.lang.String sid)
```
    Removes the Species object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the Species objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the Species object to remove
    
    Returns:
    the Species object removed. As mentioned above, the caller owns the returned object. null is returned if no Species object with the identifier exists in this Model object.
  - removeSpeciesType
```
public SpeciesType removeSpeciesType(long n)
```
    Removes the nth SpeciesType object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the SpeciesType object to remove
    
    Returns:
    the SpeciesType object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeSpeciesType
```
public SpeciesType removeSpeciesType(java.lang.String sid)
```
    Removes the SpeciesType object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the SpeciesType objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the SpeciesType object to remove
    
    Returns:
    the SpeciesType object removed. As mentioned above, the caller owns the returned object. null is returned if no SpeciesType object with the identifier exists in this Model object.
  - removeUnitDefinition
```
public UnitDefinition removeUnitDefinition(long n)
```
    Removes the nth UnitDefinition object from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it.
    
    Parameters:
    n - the index of the UnitDefinition object to remove
    
    Returns:
    the UnitDefinition object removed. As mentioned above, the caller owns the returned item. null is returned if the given index is out of range.
  - removeUnitDefinition
```
public UnitDefinition removeUnitDefinition(java.lang.String sid)
```
    Removes the UnitDefinition object with the given identifier from this Model object and returns a pointer to it.
    The caller owns the returned object and is responsible for deleting it. If none of the UnitDefinition objects in this Model object have the identifier sid, then null is returned.
    
    Parameters:
    sid - the identifier of the UnitDefinition object to remove
    
    Returns:
    the UnitDefinition object removed. As mentioned above, the caller owns the returned object. null is returned if no UnitDefinition object with the identifier exists in this Model object.
  - renameIDs
```
public void renameIDs(SBaseList elements,
             IdentifierTransformer idTransformer)
```
  - renameSIdRefs
```
public void renameSIdRefs(java.lang.String oldid,
                 java.lang.String newid)
```
    Renames all the SIdRef attributes on this element, including any found in MathML.
    
    In SBML, object identifiers are of a data type called SId. In SBML Level 3, an explicit data type called SIdRef was introduced for attribute values that refer to SId values in previous Levels of SBML, this data type did not exist and attributes were simply described to as 'referring to an identifier', but the effective data type was the same as SIdRefin Level 3. These and other methods of libSBML refer to the type SIdRef for all Levels of SBML, even if the corresponding SBML specification did not explicitly name the data type.
    This method works by looking at all attributes and (if appropriate) mathematical formulas, comparing the identifiers to the value of oldid. If any matches are found, the matching identifiers are replaced with newid. The method does not descend into child elements.
    
    Overrides:
    
    renameSIdRefs in class SBase
    
    Parameters:
    oldid - the old identifier
    newid - the new identifier
  - renameUnitSIdRefs
```
public void renameUnitSIdRefs(java.lang.String oldid,
                     java.lang.String newid)
```
    Renames all the UnitSIdRef attributes on this element.
    
    In SBML, unit definitions have identifiers of type UnitSId. In SBML Level 3, an explicit data type called UnitSIdRef was introduced for attribute values that refer to UnitSId values in previous Levels of SBML, this data type did not exist and attributes were simply described to as 'referring to a unit identifier', but the effective data type was the same as UnitSIdRef in Level 3. These and other methods of libSBML refer to the type UnitSIdRef for all Levels of SBML, even if the corresponding SBML specification did not explicitly name the data type.
    This method works by looking at all unit identifier attribute values (including, if appropriate, inside mathematical formulas), comparing the unit identifiers to the value of oldid. If any matches are found, the matching identifiers are replaced with newid. The method does not descend into child elements.
    
    Overrides:
    
    renameUnitSIdRefs in class SBase
    
    Parameters:
    oldid - the old identifier
    newid - the new identifier
  - setAnnotation
```
public int setAnnotation(java.lang.String annotation)
```
    Sets the value of the 'annotation' subelement of this SBML object to a copy of annotation.
    Any existing content of the 'annotation' subelement is discarded. Unless you have taken steps to first copy and reconstitute any existing annotations into the annotation that is about to be assigned, it is likely that performing such wholesale replacement is unfriendly towards other software applications whose annotations are discarded. An alternative may be to use appendAnnotation().
    Overrides:
    
    setAnnotation in class SBase
    
    Parameters:
    annotation - an XML string that is to be used as the content of the 'annotation' subelement of this object
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
    See Also:
    Model.appendAnnotation(String annotation)
  - setAnnotation
```
public int setAnnotation(XMLNode annotation)
```
    Sets the value of the 'annotation' subelement of this SBML object to a copy of annotation.
    Any existing content of the 'annotation' subelement is discarded. Unless you have taken steps to first copy and reconstitute any existing annotations into the annotation that is about to be assigned, it is likely that performing such wholesale replacement is unfriendly towards other software applications whose annotations are discarded. An alternative may be to use appendAnnotation().
    Overrides:
    
    setAnnotation in class SBase
    
    Parameters:
    annotation - an XML structure that is to be used as the content of the 'annotation' subelement of this object
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    See Also:
    Model.appendAnnotation(XMLNode annotation)
  - setAreaUnits
```
public int setAreaUnits(java.lang.String units)
```
    Sets the value of the 'areaUnits' attribute of this Model.
    The string in units is copied.
    Parameters:
    units - the new areaUnits for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_INVALID_ATTRIBUTE_VALUE
    "Note:"
    
    The 'areaUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - setConversionFactor
```
public int setConversionFactor(java.lang.String units)
```
    Sets the value of the 'conversionFactor' attribute of this Model.
    The string in units is copied.
    Parameters:
    units - the new conversionFactor for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_INVALID_ATTRIBUTE_VALUE
    "Note:"
    
    The 'conversionFactor' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - setExtentUnits
```
public int setExtentUnits(java.lang.String units)
```
    Sets the value of the 'extentUnits' attribute of this Model.
    The string in units is copied.
    Parameters:
    units - the new extentUnits for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_INVALID_ATTRIBUTE_VALUE
    "Note:"
    
    The 'extentUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - setId
```
public int setId(java.lang.String sid)
```
    Sets the value of the 'id' attribute of this Model.
    The string sid is copied.
    
    SBML has strict requirements for the syntax of identifiers, that is, the values of the 'id' attribute present on most types of SBML objects. The following is a summary of the definition of the SBML identifier type SId, which defines the permitted syntax of identifiers. We express the syntax using an extended form of BNF notation:
```
 letter .= 'a'..'z','A'..'Z'
 digit  .= '0'..'9'
 idChar .= letter | digit | '_'
 SId    .= ( letter | '_' ) idChar*
 
```
    The characters ( and ) are used for grouping, the character * 'zero or more times', and the character | indicates logical 'or'. The equality of SBML identifiers is determined by an exact character sequence match i.e., comparisons must be performed in a case-sensitive manner. In addition, there are a few conditions for the uniqueness of identifiers in an SBML model. Please consult the SBML specifications for the exact details of the uniqueness requirements.
    Overrides:
    
    setId in class SBase
    
    Parameters:
    sid - the string to use as the identifier of this Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_INVALID_ATTRIBUTE_VALUE
  - setLengthUnits
```
public int setLengthUnits(java.lang.String units)
```
    Sets the value of the 'lengthUnits' attribute of this Model.
    The string in units is copied.
    Parameters:
    units - the new lengthUnits for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_INVALID_ATTRIBUTE_VALUE
    "Note:"
    
    The 'lengthUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - setName
```
public int setName(java.lang.String name)
```
    Sets the value of the 'name' attribute of this Model.
    The string in name is copied.
    Overrides:
    
    setName in class SBase
    
    Parameters:
    name - the new name for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_INVALID_ATTRIBUTE_VALUE
  - setSubstanceUnits
```
public int setSubstanceUnits(java.lang.String units)
```
    Sets the value of the 'substanceUnits' attribute of this Model.
    The string in units is copied.
    Parameters:
    units - the new substanceUnits for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_INVALID_ATTRIBUTE_VALUE
    "Note:"
    
    The 'substanceUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - setTimeUnits
```
public int setTimeUnits(java.lang.String units)
```
    Sets the value of the 'timeUnits' attribute of this Model.
    The string in units is copied.
    Parameters:
    units - the new timeUnits for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_INVALID_ATTRIBUTE_VALUE
    "Note:"
    
    The 'timeUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - setVolumeUnits
```
public int setVolumeUnits(java.lang.String units)
```
    Sets the value of the 'volumeUnits' attribute of this Model.
    The string in units is copied.
    Parameters:
    units - the new volumeUnits for the Model
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_INVALID_ATTRIBUTE_VALUE
    "Note:"
    
    The 'volumeUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - unsetAreaUnits
```
public int unsetAreaUnits()
```
    Unsets the value of the 'areaUnits' attribute of this Model.
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_OPERATION_FAILED
    "Note:"
    
    The 'areaUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - unsetConversionFactor
```
public int unsetConversionFactor()
```
    Unsets the value of the 'conversionFactor' attribute of this Model.
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_OPERATION_FAILED
    "Note:"
    
    The 'conversionFactor' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - unsetExtentUnits
```
public int unsetExtentUnits()
```
    Unsets the value of the 'extentUnits' attribute of this Model.
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_OPERATION_FAILED
    "Note:"
    
    The 'extentUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - unsetId
```
public int unsetId()
```
    Unsets the value of the 'id' attribute of this Model.
    Overrides:
    
    unsetId in class SBase
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
  - unsetLengthUnits
```
public int unsetLengthUnits()
```
    Unsets the value of the 'lengthUnits' attribute of this Model.
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_UNEXPECTED_ATTRIBUTE
    LIBSBML_OPERATION_FAILED
    "Note:"
    
    The 'lengthUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - unsetName
```
public int unsetName()
```
    Unsets the value of the 'name' attribute of this Model.
    Overrides:
    
    unsetName in class SBase
    
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
  - unsetSubstanceUnits
```
public int unsetSubstanceUnits()
```
    Unsets the value of the 'substanceUnits' attribute of this Model.
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
    "Note:"
    
    The 'substanceUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - unsetTimeUnits
```
public int unsetTimeUnits()
```
    Unsets the value of the 'timeUnits' attribute of this Model.
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
    "Note:"
    
    The 'timeUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.
  - unsetVolumeUnits
```
public int unsetVolumeUnits()
```
    Unsets the value of the 'volumeUnits' attribute of this Model.
    Returns:
    integer value indicating success/failure of the function. The possible values returned by this function are:
    
    LIBSBML_OPERATION_SUCCESS
    LIBSBML_OPERATION_FAILED
    "Note:"
    
    The 'volumeUnits' attribute is available in SBML Level 3 but is not present on Model in lower Levels of SBML.

Class Model

Approaches to creating objects using the libSBML API

Consistency and adherence to SBML specifications

Model attributes introduced in SBML Level 3

The 'substanceUnits' attribute

The 'timeUnits' attribute

The 'volumeUnits', 'areaUnits', and 'lengthUnits' attributes

The 'extentUnits' attribute

The 'conversionFactor' attribute

Constructor Summary

Method Summary

Methods inherited from class org.sbml.libsbml.SBase

Methods inherited from class java.lang.Object

Constructor Detail

Model

Model

Model

Method Detail

addCompartment

addCompartmentType

addConstraint

addEvent

addFunctionDefinition

addInitialAssignment

addParameter

addReaction

addRule

addSpecies

addSpeciesType

addUnitDefinition

appendAnnotation

appendAnnotation

appendFrom

cloneObject

createAlgebraicRule

createAssignmentRule

createCompartment

createCompartmentType

createConstraint

createDelay

createEvent

createEventAssignment

createFunctionDefinition

createInitialAssignment

createKineticLaw

createKineticLawLocalParameter

createKineticLawParameter

createModifier

createParameter

createProduct

createRateRule

createReactant

createReaction

createSpecies

createSpeciesType

createTrigger

createUnit

createUnitDefinition

delete

getAreaUnits

getAssignmentRule

getAssignmentRuleByVariable

getCompartment

getCompartment

getCompartmentType

getCompartmentType

getConstraint

getConversionFactor

getElementByMetaId

getElementBySId

getElementName

getEvent

getEvent

getExtentUnits

getFunctionDefinition

getFunctionDefinition

getId

getInitialAssignment

getInitialAssignment

getInitialAssignmentBySymbol