What Structured Metadata Means - 2

A Z39.50 profile as defines a language At some level, Z39.50 is a detail Protocols are about communication, profiles are about abstraction and GILS is about content Z39.50 guarantees that the user’s query can be unambiguously decoded - no guarantees about content We could implement the profile over any protocol - http, CORBA, etc.

Does we have to use Z39.50? No, but the abstraction is required Z39.50 already includes the abstraction model

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