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. For examples of a custom attribute applied to a schema item see ECCustom Attributes.
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="HiddenProperty" appliesTo="AnyProperty" modifier="Sealed" >
<ECProperty propertyName="Show" typeName="boolean" />
</ECCustomAttributeClass>
<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>
"HiddenProperty": {
"schemaItemType": "CustomAttributeClass",
"modifier": "Sealed",
"properties": [
{
"name": "Show",
"type": "PrimitiveProperty",
"typeName": "boolean"
}
],
"appliesTo": "AnyProperty"
},
"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" }
]
},
Last Updated: 10 October, 2025
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