meta tags and MediaWiki

Ok, it can't just be me.

I am having the hardest time figuring out how to add meta tags to my wiki pages. I want to add some descriptors that might help some search engines, but, alas, I can't figure out *where* to put the tags. I don't mean I can't figure out where to put it in the code--I can't find the code. It has something to do with the fact that it's all in PHP, and there's a big database at work...I just found a wiki entry on WikiMedia about making an RDF interface for MediaWiki sites...At this point, that just sounds magical, and I've read enough about metadata to know that such a framework would be a good thing...but I think that is so far beyond me right now!

Ugh. I'm just going to go back to my little w3schools tutorial on web search engines and submit my URL to a few more sites.