if not (line.userid in user_cache):
                user_cache[line.userid] = user.User(self.request, line.userid, auth_method="text_docbook:740")
            author = user_cache[line.userid]
            if author and author.name:
                self.addTextElem(revision, "authorinitials", author.name)
            else:
                self.addTextElem(revision, "authorinitials", line.hostname or "")