Z39.50 and the Web

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Z39.50 and the Web
Brief Overview of Issues
Ray Denenberg, Library of Congress ZIG Tutorial
January 19, 2000 San Antonio
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RDF
XML
Query
encapsulation
Discovery
GRS-1
MARC
Gateways
HTTP
statelessness
XER
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Issues

• Purpose
• Topology
• Scenarios
• Functionality
• Profile(s)
• Architectural

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Purpose

• Bibliographic?
• Resource Discovery?

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Web browser
Topology
Z39.50 Server
Z39.50/web gateway
or
Z39.50 client
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Web browser
Scenarios
Z39.50 Server
gateway
Marc
xml
Z39.50 client
Marc? Xml?
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Functionality

• search/present
• scan
• sort
• duplicate detection
• access/resource control
• Encapsulation
• Unicode/utf-8

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• Purpose
• Topology
• Scenarios
• Functionality
• Profile(s)
• Develop new , single profile, for web
  applications ?
• Bath ?
• ZHTTP?
• ZDSR ?
• Architecture

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Application Level Issues

• Query (XML)
• GRS/XML
• Marc/XML
• RDF

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PDU Issues

• Abstract Level
• ASN.1
• (or XML)
• Encoding Level
• BER
• or XER

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Transport

• Z39.50 over TCP
• or Z39.5O over HTTP (over TCP)

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Topics