[xwiki-users] reference types in current object in dblist

I have an XWiki class for which I'd like to have a dblist where the hql references types in the same object. Such as: select doc.id from XWikiDocument as doc, XWikiAttachment as att where att.docId = doc.id and att.filename = string from a string member of this object Can this be done? Dan Svoboda University of Pittsburgh