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Zebra has been deployed in numerous applications, in both the academic and commercial worlds, in application domains as diverse as bibliographic catalogues, geospatial information, structured vocabulary browsing, government information locators, civic information systems, environmental observations, museum information and web indexes.

Notable applications include the following:

NLI-Z39.50 - a Natural Language Interface for Libraries

Fernuniversitšt Hagen in Germany have developed a natural language interface for access to library databases. In order to evaluate this interface for recall and precision, they chose Zebra as the basis for retrieval effectiveness. The Zebra server contains a copy of the GIRT database, consisting of more than 76000 records in SGML format (bibliographic records from social science), which are mapped to MARC for presentation.

(GIRT is the German Indexing and Retrieval Testdatabase. It is a standard German-language test database for intelligent indexing and retrieval systems. See

Evaluation will take place as part of the TREC/CLEF campaign 2003 or

For more information, contact Johannes Leveling

ULS (Union List of Serials)

The M25-Link systems team ( are involved in a project called ULS to provide a union catalogue for periodicals in 21 member libraries. They do this with an unusual architecture which they call a ``non-distributed virtual union catalogue''.

The member libraries send in data files representing their periodicals, including both brief bibliographic data and summary holdings. Then 21 individual Z39.50 targets are created, each using Zebra, and all mounted on the single hardware server. The live service provides a web gateway allowing Z39.50 searching of all of the targets or a selection of them. Zebra's small footprint allows a relatively modest system to comfortably host the 21 servers.

More information can be found at