Prior (web) classification you should settle the basic ontological questions. Going with the 'library classification' schemes you implicitly buy into pretty dusty stuff ontology-wise.

As it happens, ontology is a hobby of mine and I've recently initiated a blog for discussing and defining a new ontology at http://www.einvaal.net

While the tone of the blog is kinda informal my goals and methods for the new ontology are hardcore philosophy. Welcome onboard if interested!