A StructuralFeature defines a static characteristic of the ModelElement that contains it. The attributes and references of a Class define structural properties, which provide for the representation of the state of its instances.

Attributes
Primitive Type boolean	isChangeable	The isChangeable attribute places restrictions on the use of certain operations, which could change the set of values or instances of the StructuralFeature, and on the operations that will get generated in IDL or other language generation. For any elaboration, no means are automatically created which provides a means of altering the attribute value. When IDL is generated, for instance, the operations, which are normally generated for changing the StructuralFeature, will not be generated. However, isChangeable does not actually constrain the StructuralFeature to make it immutable. Any operations explicitly defined in a model may change the StructuralFeature values or instances (assuming the operation would have otherwise been able to do so).
Class	multiplicity	Multiplicity defines constraints on the collection of instances or values that a StructuralFeature can hold. Multiplicity defines a lower and upper bound to the cardinality of the collection, although the upper bound can be specified as Unbounded.

 isChangeable

public Primitive Type boolean isChangeable

The isChangeable attribute places restrictions on the use of certain operations, which could change the set of values or instances of the StructuralFeature, and on the operations that will get generated in IDL or other language generation. For any elaboration, no means are automatically created which provides a means of altering the attribute value. When IDL is generated, for instance, the operations,
which are normally generated for changing the StructuralFeature, will not be generated. However, isChangeable does not actually constrain the StructuralFeature to make it immutable. Any operations explicitly defined in a model may change the StructuralFeature values or instances (assuming the operation would have otherwise been able to do so).

Properties:

Aggregation	none
Alias
Association
Association End
Class	Class StructuralFeature
Collections
Datatype
Default
Default Value
Is Composite	false
Is Derived	false
Is Derived Union	false
Is Leaf	false
Is Ordered	false
Is Read Only	false
Is Static	false
Is Unique	true
Keywords
Lower	1
Lower Value
Multiplicity	1
Name	isChangeable
Name Expression
Opposite
Owned Template Signature
Owner	Class StructuralFeature
Owning Association
Owning Parameter
Qualified Name	model1::model1::StructuralFeature::isChangeable
Stereotype
Template Parameter
Type	Primitive Type boolean
Upper	1
Upper Value
Visibility	public

 multiplicity

public Class multiplicity

Multiplicity defines constraints on the collection of instances or values that a StructuralFeature can hold. Multiplicity defines a lower and upper bound to the cardinality of the collection, although the upper bound can be specified as Unbounded.

Properties:

Aggregation	none
Alias
Association
Association End
Class	Class StructuralFeature
Collections
Datatype
Default
Default Value
Is Composite	false
Is Derived	false
Is Derived Union	false
Is Leaf	false
Is Ordered	false
Is Read Only	false
Is Static	false
Is Unique	true
Keywords
Lower	1
Lower Value
Multiplicity	1
Name	multiplicity
Name Expression
Opposite
Owned Template Signature
Owner	Class StructuralFeature
Owning Association
Owning Parameter
Qualified Name	model1::model1::StructuralFeature::multiplicity
Stereotype
Template Parameter
Type	Class
Upper	1
Upper Value
Visibility	public

• A StructuralFeature defines a static characteristic of the ModelElement that contains it. The attributes and references of a Class define structural properties, which provide for the representation of the state of its instances.