It's not important that representation of meaning presents a problem to some philosophers. It is important that we are beginning to hurl meaning around the world.
Civilization arrives on the 'net.
Civilization is always associated with some form of literature. So here we have the revenge of the literary nerds upon the dominant mathematical paradigm in computing. To anyone with a literary background, tags make perfect sense because the very imperfections and bias of the tags also convey great meaning. On the one hand, we have doubts expressed about XML because tags are a dubious representation of knowledge, and on the other we have the assertion that lack of a hyper-text processor is what ales us. Having studied the Declaration of Independence via Xanadu, one still must sit down and communicate a fairly linear narrative explaining the meaning one finds there.