I have an rdf document written in xml, housing meta descriptions for each of my pages. I can't remember where, but I read that this would be a great way for spiders to index your site. I have an ok PR4 on my homepage, and PR3 on most other pages, although I'v had very few visits from googlebot according to my logs. The rdf document is kept in a seperate directory called 'meta' and I use the following tag to direct spiders there.
<link rel="meta" href="meta/index.rdf">
Does googlebot cosider this as spam or is this part of the reason for my PR4, or does it ignore the tag and the document altogether?
PS, I have sort of asked about this in the googleguy questions post, but I thought I'd ask if anyone else knew :D