A fun to read after-the-fact formulation of principles behind Web that has no place in the real world.  One of the key principle is: Use absolute URI references.  There was a storm of arguments for and against this principle about a year ago (I think) both in public and in W3C WGs, and I have no recollection of a consensus being reached.  Meanwhile, one striking feature of W3C specs is that when you Save As MHT files for offline reading, intra-document links are broken because they are using absolute URI for even intra-document links.  Another clash of Principle and Reality, I suppose.