[Name] idlocation [Required] false [Attribute Constraints] This attribute may not occur with 'id'. [Type] Location expression [Default Value] none [Valid Values] Any valid location expression [Description] 
Any location expression evaluating to a data model location. See 8.2 Location Expressions for details. The location's value will be set to an internally generated unique identifier of type NMTOKEN to be associated with the message being sent.