[Zope] Get help about variable and entity of Zope.

Hi: I am troubled by a question with DTML. With DTML,I define a variable AA, and let AA equal a object's ID, HOW can I get the object's property through the variable AA? Maybe need a function? Need your help? I want to express as : <dtml-call "AA.propertysheets.SUBJECT.manage_changeProperties (Name=1)"> Thanks with best regards!