Base Infrastructure Schema › Ec › Ec Custom Attributes
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ECCustomAttributes

Instances of ECCustomAttributeClasses that are applied to other items in a schema to add new metadata attributes. Any number of custom attributes may be applied to a schema item but only one instance of each class may be applied.

For example:

<ECProperty propertyName="LastMod" typeName="dateTime" displayLabel="Last Modified" description="The last modified time of the bis:Element."> <ECCustomAttributes> <DateTimeInfo xmlns="CoreCustomAttributes.1.0"> <DateTimeKind>Utc</DateTimeKind> </DateTimeInfo> <HiddenProperty xmlns="CoreCustomAttributes.1.0"/> </ECCustomAttributes> </ECProperty>
{ "name" : "LastMod", "description" : "The last modified time of the bis:Element.", "isReadOnly" : true, "label" : "Last Modified", "type" : "PrimitiveProperty", "typeName" : "dateTime", "customAttributes" : [ { "DateTimeKind" : "Utc", "className" : "CoreCustomAttributes.DateTimeInfo" }, { "className" : "CoreCustomAttributes.HiddenProperty" } ] },

The custom attribute concept allows any custom metadata to be applied because they are defined using a special type of ECClass, see ECCustomAttributeClass for more details

Note: The order of custom attributes within its parent container is not guaranteed. Our APIs will return a consistent order, but it may not always be the same as the order in which they were defined in the schema. This should not be a problem since the same custom attribute may only be applied once.

Last Updated: 11 June, 2025