[Mediawiki-l] All pages that use <mytag>?

I've written a parser extension, <mytag>, and would like to identify all pages that use it. What's the best way to do this? - Make <mytag>, when parsed, automatically append [[Category:Pages that use mytag]] to the page output? Is this possible/workable? Can you add a category programmatically like this, and will it show up in Special:Categories? - Create a new Special page that lists all pages that use the tag, via SQL query? (Meaning I will now have coupling between the <mytag> extension and the Special page.) - Other ideas? Thanks, DanB --------------------- Confidentiality note The information in this email and any attachment may contain confidential and proprietary information of VistaPrint and/or its affiliates and may be privileged or otherwise protected from disclosure. If you are not the intended recipient, you are hereby notified that any review, reliance or distribution by others or forwarding without express permission is strictly prohibited and may cause liability. In case you have received this message due to an error in transmission, please notify the sender immediately and delete this email and any attachment from your system. ---------------------