The most better definition of "document" I've ever read

Straight to the point (From Rob Weir blog, "ODF enters the Semantic Web"):

We have data in a document -- "Words,words, words" as Hamlet tells Polonius. But for those who work with thoughts, the present constraints of encoding our knowledge as simple linear strings of Unicode characters is severe. In general text is multi-layered and hyper-linked in strange and marvelous ways. Your father's word processor and word processor format are inadequate to the task. The concept of a document as being a single storage of data that lives in a single place, entire, self-contained and complete is nearing an end. A document is a stream, a thread in space and time, connected to other documents, containing other documents, contained in other documents, in multiple layers of meaning and in multiple dimensions. What we call a traditional document is really just a snapshot in time and space, a projection into print-ready output form, of what documents will soon become.

No comments... you better read his post here.