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Where is the Web in the Web of - page 7 / 9

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Semantic “Depth” and Complexity

Explicit Semantics - used for interoperability across domains

“C” represents explicit common formats and assumptions required for effective interoperability between different domains

“A”

Implicit Semantics - within a given domain

“Deepest” semantics required when no shared domain

“C”

“B”

“Overlap factor” is C A+B+C

Examples - hard-coded routine has high implicit semantics; highly negotiated, annotated composible service has high explicit semantics, etc

Each circle represents semantics of a service/source and the overlap is the common semantics/terms.

UK e-science, 9/03

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