An anonymous reader writes "Microsoft Australia has come under fire from rival vendors and open-source advocates for keeping its Office document standards proprietary. Greg Stone, Microsoft's national technology officer for Australia and New Zealand, faced criticism during his presentation at the Australian Unix User Group conference in Canberra yesterday. However, he stood firm on the company's policy of making the XML schemas for its Office 2003 document standard publicly available provided interested parties sign an agreement with the software heavyweight. "Why should I have to sign an agreement?" one audience member demanded to know."