Levels of Interoperability

• User Task level

  • do systems support IR tasks of one or more user groups?

• Semantic level

  • can Z-clients and Z-servers and local IR systems preserve and act on meaning of IR tasks

• High-level protocol (functional)

  • do Z-client and Z-servers support appropriate Z39.50 services for user tasks

• Low-level protocol (syntactic)

  • do Z-client and Z-servers interchange PDUs according to standard?

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