This is an abstract class for modeling different types of variables that can be used to form a PolicyStatement. The variable specifies an attribute or concept that should either be matched or in some way compared to a value when the condition is evaluated.

There are three important factors that must be taken into account in the design of variables. The first is that not every combination of a variable and a value creates a meaningful condition. For example, port numbers cannot be negative. Rather, the type of variable in the condition defines the set of matchable value types.

Second, just because a value has the correct datatype does not mean that it can be meaningfully compared to a variable. To continue the above example, a port of 1,000,000 is meaningless. This is handled in this model by specifying constraints (using OCL) that apply to a particular variable that must be obeyed by any value that it is being compared to. The ExpectedPolicyValuesForVariable association binds a PolicyVariable to a PolicyValue; any constraints that are required in this binding are added to an instance of this association using OCL.

Third, while the SID model defines a set of useful PolicyVariables, there is a high likelihood that specific applications will need extensions to these variables. This is accommodated through the notion of implicit and explicit PolicyVariable classes.

Attributes
PolicyOperator	_policyOperator
PolicyStatement	_policyStatement
PolicyValue	_policyValue

Attributes inherited from  SID Models::Common Domain::Policy ABE::Policy Framework ABE::Policy

_policyApplication,  keywords,  policyName,  _policyRepository,  _policyDomain

Attributes inherited from  SID Models::Common Domain::Root Business Entities ABE::RootEntity

_rootEntityType,  _revenueAssuranceParmValue,  _characteristicValue,  name,  description,  ID,  metric,  _monitoredMetricInstancesCriteria,  directedEdge,  vertex,  entityCatalogItem,  rootEntityGroupMember,  rootEntityGroup,  rootEntityRelationship,  rootEntityRelationship2,  associationRole,  entitySpecificationAttachment,  interactionUseCase,  interactionResult

 _policyOperator

Public PolicyOperator _policyOperator

Constraints:

Properties:

Aggregation	None
Alias
Association	OperatorConstraintDetails
Association End
Class	PolicyVariable
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	false
Keywords
Lower	1
Lower Value	(1)
Multiplicity	1..*
Name	_policyOperator
Name Expression
Namespace	PolicyVariable
Opposite	_policyVariable
Owner	PolicyVariable
Owning Association
Owning Template Parameter
Qualified Name	SID Models::Common Domain::Policy ABE::Policy Structure ABE::Policy Variable ABE::PolicyVariable::_policyOperator
Stereotype
Template Parameter
Type	PolicyOperator
Upper	*
Upper Value	(*)
Visibility	Public

 _policyStatement

Public PolicyStatement _policyStatement

Constraints:

Properties:

Aggregation	None
Alias
Association	UsesVariable
Association End
Class	PolicyVariable
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	false
Keywords
Lower	0
Lower Value	(0)
Multiplicity	*
Name	_policyStatement
Name Expression
Namespace	PolicyVariable
Opposite	_policyVariable
Owner	PolicyVariable
Owning Association
Owning Template Parameter
Qualified Name	SID Models::Common Domain::Policy ABE::Policy Structure ABE::Policy Variable ABE::PolicyVariable::_policyStatement
Stereotype
Template Parameter
Type	PolicyStatement
Upper	*
Upper Value	(*)
Visibility	Public

 _policyValue

Public PolicyValue _policyValue

Constraints:

Properties:

Aggregation	None
Alias
Association	ValueConstraintDetails
Association End
Class	PolicyVariable
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	false
Keywords
Lower	1
Lower Value	(1)
Multiplicity	1..*
Name	_policyValue
Name Expression
Namespace	PolicyVariable
Opposite	_policyVariable
Owner	PolicyVariable
Owning Association
Owning Template Parameter
Qualified Name	SID Models::Common Domain::Policy ABE::Policy Structure ABE::Policy Variable ABE::PolicyVariable::_policyValue
Stereotype
Template Parameter
Type	PolicyValue
Upper	*
Upper Value	(*)
Visibility	Public