Oasis (with custom configuration) allows any multiple-site library running Oasis to be part of a virtual union catalog. If a merged database is not desired or if libraries are not directly affiliated, libraries can participate in a virtual union catalog but maintain their collections separately. A virtual union catalog is created by installing M3 Server and Oasis on all library automation servers; no client soft- ware is needed at the library sites. M3 Server software can be configured so patrons can search single or multiple databases simultaneously. There is a charge for customizing the software based on the number of library collections. This model runs on central server or local server solutions.
Catalog Searching – A directory is created that includes the IP address of each par- ticipating library. Once this is defined, Catalog searchers can select all sites or spe- cific sites for searching. When a search is executed, results are returned along with library locations. Duplicate records are not automatically removed in a virtual union catalog.
Circulating from the Union Catalog – Circulation occurs at each individual library.
Cataloging and Maintenance – Reports are generated and cataloging is updated at each individual library.
Virtual Union Catalog with Oasis and Z39.50 Protocol
Z39.50 software is required for a virtual union catalog if libraries not using Oasis or M3 are participating union catalog members. Library sites not using Oasis or M3 must have Z39.50 client software to access and search bibliographic information. They must also have Z39.50 server software so Oasis can broadcast their bibliographic information and allow it to be searched by other libraries. Performance is dependent on the total number of sites, circulation and patron workstations, and the communications infrastructure (T1 lines are recommended). This model runs on central server or local server solutions.
Catalog Searching – A directory is created that includes the IP address of each participating library. Once this is defined, Catalog searchers can select all sites or specific sites for searching. When a search is executed, results are returned along with library locations. Non-Oasis sites require Z39.50 services to be searched by Oasis. The sites running Oasis need to be configured to search the non-Oasis sites using Z39.50. When searching non-Oasis sites, holding and transaction information is not usually available. Duplicate records are not automatically removed in a virtual union catalog.
Circulating from the Union Catalog – Circulation occurs at each individual library.
Cataloging and Maintenance – Reports are generated at each individual library. Virtual union catalogs can be updated centrally or locally:
If cataloging is performed centrally, bibliographic records can be imported in batches from remote building sites to the specific record col- lections on the central server.
If cataloging functions are performed at the local site level, cataloging can be restricted to authorized staff and specific record collections. Updates at the site level are immediately displayed in that site’s Catalog.
