dmaClass_Relationship

This is the base class for binary relationships between independently persistable objects of a Document Space.

Class ID: dmaClass_Relationship
Superclass: DMA

Interfaces

Properties

Name	Impl. Required	System Gen'ed	Read-Only	Value Required	Type	Cardinality	Required Class
OIID	-	Yes	Yes	-	String	Scalar
Class Description	Yes	Yes	Yes	Yes	Object	Scalar	Class Description
This	-	Yes	Yes	Yes	Object	Scalar	Relationship
Create Pending	-	Yes	Yes	Yes	Boolean	Scalar
Update Pending	-	Yes	Yes	Yes	Boolean	Scalar
Delete Pending	-	Yes	Yes	Yes	Boolean	Scalar
Head	Yes	-	-	Yes	Object	Scalar	DMA
Tail	Yes	-	-	Yes	Object	Scalar	DMA

Detailed Description

The base class dmaClass_Relationship models an association between a pair of objects within a DMA DocSpace. This class is introduced to permit "edge data" related to the association to be maintained. The first type of association enabled by subclasses of dmaClass_Relationship is containment. Other relationship types are possible.

Property Descriptions

• OIID {dmaProp_OIID}
Property Inherited from DMA

• Class Description {dmaProp_ClassDescription}
Property Inherited from DMA

• This {dmaProp_This}
Property Inherited from DMA

• Create Pending {dmaProp_CreatePending}
Property Inherited from DMA

• Update Pending {dmaProp_UpdatePending}
Property Inherited from DMA

• Delete Pending {dmaProp_DeletePending}
Property Inherited from DMA

• Head {dmaProp_Head}

The value of this property is the independently persistable object at the "Head" end of the binary relationship.

This is a property of a Relationship object which identifies the object logically at the head end of an arrow between two related objects. In the case of containment, it is the contained object. The Head property is paired reflectively with the Containers, or Parent property of that object, for referential or direct containment, respectively.

• Tail {dmaProp_Tail}

The object in a Relationship which is logically at the tail end of an arrow between two related objects.

In the case of containment, it is the containing object. The Tail property is paired reflectively with the Containees, or Children, property of that object, for referential or direct containment, respectively.