To a computer, the Web is a flat, boring world, devoid of meaning.

This is a pity, as in fact documents on the Web describe real objects and imaginary concepts, and give particular relationships between them.

For example, a document might describe a person.
The title document to a house describes a house and also the ownership relation with a person.
Adding semantics to the Web involves two things: allowing documents which have information in machine-readable forms, and allowing links to be created with relationship values.
Only when we have this extra level of semantics will we be able to use computer power to help us exploit the information to a greater extent than our own reading.
Tim Berners-Lee "W3 future directions" keynote
1st World Wide Web Conference Geneva, May 1994
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