David Weinberger at JOHO says in Metadata and Desire:

This is no longer the Age of Information. It's the Age of Metadata

Metadata can't be perfect. There is no 'right' way to categorize everything and even if there were, you'd never convince everyone to use it. A lot of information is organiz--it comes from where it comes from and it is what it is, trying to categorize it may kill it before it ever gets circulated or, at least, make it no easier to find and more difficult to identify.

...metadata, an abstraction of an abstraction, is directly and intimately tied to human projects and human desire. And what's desire? Nothing but the way we're pulled into the world, over and over, against our will and in ways that constantly surprise us. So, the increasing need for metadata pulls us out of the world as our desire continuously pulls us into the world.

Welcome to the rhythm of the modern world