Specifies the data-type identifier of the property described by this Image Services property description, which is the Content Engine data
type corresponding to the Image Services server data type for a given property.
Specifies the name of the property described by this Image Services (IS) property description, which must corresponds to an
existing IS property of the same name. This property is used by the IS Import Agent to map the properties of an IS document to
Content Engine properties when importing federated documents.