The Zthes Context-Set for CQL, v1.0

9th March 2006

(See The Zthes Context-Set for CQL for an overview of what this is and what it's used for.)

Indexes

Version 1.0 of the Zthes context-set is uniquely identified by the URI http://zthes.z3950.org/cql/1.0

It contains the following indexes:

Name	Equivalent Zthes-1 Access Point	Description
qual	1	Searches in the `termQualifier` element of the top-level term record
type	2	Searches in the `termType` element of the top-level term record
admin	3	Used for a variety of searches related to administrative details of thesaurus structure - see below.
nt	4 with semantic qualifier `NT`	searches for all narrower terms of the record whose `termID` is equal to the search term. For example, a search for `nt=abc123` finds all the narrower terms of the record whose `termID` is `abc123` - Note, not the records of those terms that have `abc123` as a narrower term.
bt	4 with semantic qualifier `BT`	searches for all broader terms of the record whose `termID` is equal to the search term.
use	4 with semantic qualifier `USE`	searches for the preferred term of the record whose `termID` is equal to the search term.
uf	4 with semantic qualifier `UF`	searches for all non-preferred terms of the record whose `termID` is equal to the search term.
rt	4 with semantic qualifier `RT`	searches for all ``related terms'' of the record whose `termID` is equal to the search term.
le	4 with semantic qualifier `LE`	searches for all linguistic equivalents of the record whose `termID` is equal to the search term - that is, preferred terms representing the same concept - or ``sufficiently close'' concepts - in different languages.

The admin index must be used with one of a small set of well-known strings as the search term. Servers may support the following values:

``start''	Searches for all records considered suitable as starting points for browsing.
``whole''	Searches for a special record describing the thesaurus as a whole, and containing material such as introductory text and revision history that might be front matter in a printed thesaurus. This record, when it exists at all, may not be found in any other search. This profile does not currently specify the format of this special record.