| http://www.w3.org/ns/prov#value | - In fact, one of the most important points to be made about the contributions presented here is that they demonstrate how multifaceted many of these phenomena are: knowledge (physical documents, citations, or cognitive system); life cycle (one or many for a given knowledge area); value (what does it mean for a person to be current or for a document to be of a given quality?); and depreciation or ob
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