1. Virtual Collections VIRTUAL COLLECTIONS Focus on Metadata Cataloging Discussion Group, Friday, November 18

2. Virtual Collections What is “Virtual Collections” OIS System to allow librarians / curators to harvest metadata from various Harvard online catalogs and create a new, topic- based collections. Web-based interface for collection-level search and display of metadata, with links to digital objects. A Virtual Collection constists of metadata only; records link to external digital objects

3. Virtual Collections Major Aspects of Virtual Collections Harvesting: Initially supporting harvesting from HOLLIS, VIA and HGL No additional cataloging necessary in source catalogs (HOLLIS, VIA, HGL) Local Subject Vocabulary: Curator can create a controlled list of subject terms, distinct from any subjects in the harvested records. Customization: Collection can customize appearance of these with XSL and CSS stylesheets.

4. Virtual Collections Metadata Focus Harvesting of Metadata from HOLLIS, VIA, HGL Transformation of Metadata from original form to final Virtual Collection form (MODS) What the metadata looks like displayed in a Virtual Collection (aka Demo)

5. Virtual Collections Harvesting: OIS Harvester OIS Harvesting software –reads “harvest file” of system/id pairs HOLLIS002223743 VIAolvwork125041 HGLMGISRAILTRA1 –file can be initialized from an Aleph report for HOLLIS, and the Portfolio function of VIA. –Harvester requests records from catalogs, transforms and loads into Virt. Coll. database

6. Virtual Collections Harvesting: OAI-PMH Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH ) OAI Harvester ->http request ->OAI DataProvider OAI DataProvider ->xml record ->OAI Harvester HOLLIS:Data Provider from ExLibrisHOLLIS VIA:OIS Custom Data ProviderVIA HGL:OIS Custom Data ProviderHGL

7. Virtual Collections Harvesting: Transformations HOLLIS –MARC21 (xml) -> xsl -> MODS (xml)xml VIA –VIA (xml) - xsl -> MODS (xml) MODSxml HGL –FGDC (xml) -> MARC21 (xml) -> MODS (xml)xml

8. Virtual Collections MODS Metadata Standard Metadata Object Description Schema MODS Top Level ElementsElements MODS SchemaSchema MARC to MODS CrosswalkCrosswalk MARCXML to MODS XSL stylesheetXSL stylesheet

9. Virtual Collections Why MODS for Virtual Collections? Richer metadata than Dublin Core Clean mapping from MARC to MODS Supports hierarchical VIA records –relatedItem element Virtual Collections Schema –One primary schema for all collectionsschema –Local Subject schema for each collection *schema*

10. Virtual Collections Demo of Prototype Bicycle Virtual Collection –Contains records from HOLLIS VIA HGL 002223743 olvwork93048 local olvwork125041 MGISRAILTRA1