PropertyDef Object

Meta Data Services Programming

Meta Data Services Programming

PropertyDef Object

When you define a class for an information model, you specify the interfaces that the class implements. For each of those interfaces, specify the members (properties, methods, and collections) that are attached to the interface.

Before you can attach a property to an interface, a property definition object must exist for the property. The characteristics of the property (its name, dispatch identifier, data type, and various storage details) are stored in the property definition object. These characteristics are defined by the properties of the property definition object.

To create a new property definition

  1. Use the CreatePropertyDef method of the InterfaceDef object.

  2. Define any non-default characteristics of your new property definition by manipulating the properties of the property definition object.

  3. Commit your changes to a repository database.

A PropertyDef object is also a RepositoryObject and a RepositoryObjectVersion object. You can also access members that are defined for these objects, and members of IInterfaceMember2, IViewPropertyDef and IVersionAdminInfo2. For more information about accessing a member of an interface that is not the default interface, see Accessing Automation Object Members.

When to Use

Use the PropertyDef object to retrieve or modify the characteristics of a property definition, or to determine which interface exposes a particular property.

Properties
Property Description
APIType The C data type of the property
ColumnName The name of the column in the SQL table for this property
DispatchID The dispatch identifier to use when accessing an instance of this type of property
Flags Flags that specify details about this property definition
MemberSynonym Stores a synonym of the property name
SQLBlobSize The SQL BLOB size of the property
SQLScale The number of digits to the right of the decimal point for a numeric property
SQLSize The size in bytes of the property
SQLType The SQL data type of the property

Collections

Collection Description
EnumerationDef The collection of EnumerationDef objects to which this property definition is attached
Interface The interface to which this property definition is attached
Properties The collection of all persistent properties that are attached to the PropertyDef object

See Also

EnumerationDef Object

InterfaceDef CreateProperty Method

RepositoryObject Object

RepositoryObjectVersion Object