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