Zebra is a high-performance, general-purpose
structured text indexing and retrieval engine. It reads structured records in a
variety of input formats (eg. email, XML, MARC) and allows access to them
through exact boolean search expressions and relevance-ranked free-text queries.
Zebra supports large databases (more than ten gigabytes of data, tens of
millions of records). It supports incremental, safe database updates on live
systems. You can access data stored in Zebra using a variety of Index Data tools
(eg. YAZ and PHP/YAZ) as well as commercial and freeware Z39.50 clients and
toolkits. Zebra is free software, available under the GPL license. It may be
used by anyone without charge. If you wish to incorporate Zebra into a
commercial software distribution, please contact us about alternative licenses.