GJXDM contains types (e.g., CaseOfficialType) that represent specific roles that people play.  How do I include Person information in these types?

Note that specific person role types (like CaseOfficialType) extend PersonType, and so automatically inherit all of the properties of PersonType.  Since element sequence follows the inheritance hierarchy, in an XML instance, the PersonType information would appear first, followed by the CaseOfficialType information.