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ECCustomAttributeClass

ECCustomAttributeClasses define custom metadata which may be applied to any schema item which allows ECCustomAttributes. For a list of schema items which may have a custom attribute applied see CustomAttribute Container Types.

Additional Attributes

appliesTo The CustomAttribute Container Types define what ECSchema items an ECInstance of a custom attribute class can be applied to. Multiple container types can be specified using a comma separated string, e.g. Schema, EntityClass, StructClass .

Examples

<ECCustomAttributeClass typeName="DateTimeInfo" description="Optional additional meta data for ECProperties of type DateTime." appliesTo="PrimitiveProperty, ArrayProperty" modifier="Sealed"> <ECProperty propertyName="DateTimeKind" typeName="DateTimeKind" description="Either Utc, Local or Unspecified. Default: Unspecified."/> <ECProperty propertyName="DateTimeComponent" typeName="DateTimeComponent" description="Either DateTime or Date. Default: DateTime."/> </ECCustomAttributeClass> <ECEnumeration typeName="DateTimeKind" backingTypeName="string" isStrict="true"> <ECEnumerator value="Unspecified" name="Unspecified"/> <ECEnumerator value="Utc" name="Utc"/> <ECEnumerator value="Local" name="Local"/> </ECEnumeration> <ECEnumeration typeName="DateTimeComponent" backingTypeName="string" isStrict="true"> <ECEnumerator value="DateTime" name="DateTime"/> <ECEnumerator value="Date" name="Date"/> <ECEnumerator value="TimeOfDay" name="TimeOfDay"/> </ECEnumeration>
"DateTimeInfo": { "schemaItemType": "CustomAttributeClass", "description": "Optional additional meta data for ECProperties of type DateTime.", "modifier": "Sealed", "properties": [ { "name": "DateTimeKind", "type": "PrimitiveProperty", "description": "Either Utc, Local or Unspecified. Default: Unspecified.", "typeName": "CoreCustomAttributes.DateTimeKind" }, { "name": "DateTimeComponent", "type": "PrimitiveProperty", "description": "Either DateTime or Date. Default: DateTime.", "typeName": "CoreCustomAttributes.DateTimeComponent" } ], "appliesTo": "PrimitiveProperty, ArrayProperty" }, "DateTimeKind": { "schemaItemType": "Enumeration", "type": "string", "isStrict": true, "enumerators": [ { "name": "Unspecified", "value": "Unspecified" }, { "name": "Utc", "value": "Utc" }, { "name": "Local", "value": "Local" } ] }, "DateTimeComponent": { "schemaItemType": "Enumeration", "type": "string", "isStrict": true, "enumerators": [ { "name": "DateTime", "value": "DateTime" }, { "name": "Date", "value": "Date" }, { "name": "TimeOfDay", "value": "TimeOfDay" } ] },

See ECCustom Attributes for examples of a custom attribute applied to a schema item.

Last Updated: 07 June, 2025