Three kinds of things in the universe:
1. Web resources (Non-Web resources:) 2. Physical objects Cars, people, houses, etc. 3. Abstract concepts Sizes, colors, verbs, "love", etc. "Creator" (e.g., the creator of a document) "Airline reservation"
(Non-Web resources:)
2. Physical objects Cars, people, houses, etc. 3. Abstract concepts Sizes, colors, verbs, "love", etc. "Creator" (e.g., the creator of a document) "Airline reservation"
2. Physical objects
David Booth
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