How does the GILS Profile differ from the Z39.50 standard itself?
The ANSI Z39.50 standard is a complex specification with many features. However, a server may be compliant with Z39.50 and yet not be capable of handling structured metadata. The GILS Profile select only a minimum number of Z39.50 features but it requires those few features on every compliant server. In the GILS Profile, the search service is only defined at the server side of a client/server interface. It specifies support of Boolean queries (Type 1) using four structures (word, word list, date, URL) and five relations (less than, less than or equal, equal, greater than or equal, greater than, not equal). Queries on a GILS-compliant server are applied to a few well-known search access points common to bibliographic and other structured metadata: Title, Originator, Distributor, Subject Terms, Date of Last Modification, and Record Source, plus a server-unique identifier called Local Control Number. The search access attributes known as “Any” and “Anywhere” enable full-text search, and t
