dmaClass_PropertyDescriptionObject

A metadata class object describing an object property.

Class ID: dmaClass_PropertyDescriptionObject
Superclass: Property Description

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	Property Description Object
Create Pending	-	Yes	Yes	Yes	Boolean	Scalar
Update Pending	-	Yes	Yes	Yes	Boolean	Scalar
Delete Pending	-	Yes	Yes	Yes	Boolean	Scalar
Display Name	Yes	-	-	Yes	String	Scalar
Descriptive Text	Yes	-	-	Yes	String	Scalar
Ids	Yes	-	-	Yes	ID	List
Data Type	Yes	Yes	Yes	Yes	Integer32	Scalar
Cardinality	Yes	-	-	Yes	Integer32	Scalar
Is Selectable	Yes	-	-	Yes	Boolean	Scalar
Is Searchable	Yes	-	-	Yes	Boolean	Scalar
Is Orderable	Yes	-	-	Yes	Boolean	Scalar
Query Operator Descriptions	Yes	-	-	-	Object	List	Query Operator Description
Is System Generated	Yes	-	-	Yes	Boolean	Scalar
Is Read Only	Yes	-	-	Yes	Boolean	Scalar
Is Value Required	Yes	-	-	Yes	Boolean	Scalar
Is Hidden	Yes	-	-	Yes	Boolean	Scalar
Property Default Object	Yes	-	-	-	Object	Scalar
Property Selections Object	Yes	-	-	-	Object	List
Required Class	Yes	-	-	-	Object	Scalar	Class Description
Reflective Property Id	Yes	-	-	-	ID	Scalar

Detailed Description

The current object is an element in the Property List of a Class Description object. The current object describes a single property of the class being described by the Class Description object. The base datatype of the property being described is object.

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

• Display Name {dmaProp_DisplayName}
Property Inherited from Property Description

• Descriptive Text {dmaProp_DescriptiveText}
Property Inherited from Property Description

• Ids {dmaProp_Ids}
Property Inherited from Property Description

• Data Type {dmaProp_DataType}
Property Inherited from Property Description

• Cardinality {dmaProp_Cardinality}
Property Inherited from Property Description

• Is Selectable {dmaProp_IsSelectable}
Property Inherited from Property Description

• Is Searchable {dmaProp_IsSearchable}
Property Inherited from Property Description

• Is Orderable {dmaProp_IsOrderable}
Property Inherited from Property Description

• Query Operator Descriptions {dmaProp_QueryOperatorDescriptions}
Property Inherited from Property Description

• Is System Generated {dmaProp_IsSystemGenerated}
Property Inherited from Property Description

• Is Read Only {dmaProp_IsReadOnly}
Property Inherited from Property Description

• Is Value Required {dmaProp_IsValueRequired}
Property Inherited from Property Description

• Is Hidden {dmaProp_IsHidden}
Property Inherited from Property Description

• Property Default Object {dmaProp_PropertyDefaultObject}

The default object for this property.

• Property Selections Object {dmaProp_PropertySelectionsObject}

The list of objects that may be assigned to this property.

If a selection list is provided, only an object existing in the list can be assigned to this property.

• Required Class {dmaProp_RequiredClass}

Specifies the class to which all objects delivered by the enumeration will conform.

• Reflective Property Id {dmaProp_ReflectivePropertyId}

The current Property Description Object describes an object valued property P of some class A. Suppose that objects of class A are independently persistent. Suppose also that objects of the required class of P, B, are also independently persistent. Then we say that obtaining the value of P is "navigating" from one object instance to another. In some such cases, a property in class B may provide a reverse navigation path, from the instance of class B to an instance of Class A having the same OIID as the original object. The property of B that provides this reverse path is termed the reflective property, and the Reflective Property Id identifies this property by means of one of its Ids. (Any of the Ids of the reflective property).

An invariant holds amongst the classes and properties involved in a reflective relationship. Let P be the described property (in class A) and Q be its reflective property (in class B, the required class of P). Further, let C be the class that introduces P (a superclass of A if P is inherited, and otherwise A itself). The required class of Q must be a subclass of C for which A is a subclass, and the reflective property of Q must be P.