MediaWiki is a fantastic wiki, but it is TERRIBLE for document management.
In a real document management system, here is how you edit a document:
1. Click the document, locking it from edits by other users 2. Edit it 3. Save it
It's that simple. In MediaWiki, it looks like this, EVERY time you need to edit:
1. Download the document to your PC. 2. Edit it. 3. Save it. 4. Browse to the MediaWiki upload page 5. Upload it, using the same File:xxxxx name as the original document (assuming you remember it) 6. Panic, when you realize someone else uploaded the same document a few minutes before you did, and you just wiped out their changes without realizing.
MediaWiki is not a content management system. It's just an amazing wiki.
DanB