the state of the ndltd union catalog t. hickey & t. dehn, oclc etd 2003
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The State of the NDLTDUnion Catalog
T. Hickey & T. Dehn, OCLC
ETD 2003
The Catalog
• OCLC harvests records
• Creates union catalog
• Union catalog is itself harvestable
• Metadata only – not the theses themselves
Capabilities
• Harvesting– OAI-PMH versions 1.1 and 2.0
• Harvestable sets– Sets by institution
• Searching– SRU (Z39.50 on the Web)– VTLS– Virginia Tech Open Digital Library demo
• Unicode support
Statistics
• 19 Sources
• 61,998 records– Probably some overlap
• Adding 1-2 new sites/month
Metadata Formats
• Dublin Core – All
• ETDMS – 9
• MARC – 5
Record Counts
• > 10,000 – OCLC_ETD, VTETD• > 5,000 – HKU, NSYSU, MIT• > 1,000 – UUdiva, LSU, CALTECH• > 500 – HUMBOLT, LMU• > 100 – NCSU, PHYSNET, PITT,
VIENNA, DUETT, DRESDEN, WATERLOO
• > 0-50 – USF, Laval, UBC
Future Plans
• Better integration with WorldCat– E.g., De-duplication, FRBRization
• Different sets?
• Better searching (SRU/SRW)
• Open to suggestions
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