Thesaurus configuration

A thesaurus is a book that lists words grouped together according to similarity of meaning (containing synonyms and sometimes antonyms), in contrast to a dictionary, which contains definitions and pronunciations.

In Information Science, Library Science, and Information Technology, specialized thesauri are designed for information retrieval. They are a type of controlled vocabulary, for indexing or tagging purposes. If you want more information about the term you can take a look at http://en.wikipedia.org/wiki/Thesaurus.  

OpenKM can work with thesaurus defined in .owl and .rdfs formats.

There's a great utility http://protege.stanford.edu/ for creating and maintaining your own thesaurus. Specific thesauri can be found on the Internet. For example, Agrovoc ( FAO ), NASA Thesaurus, UNESCO Thesaurus, Public administration Thesaurus among others. Some of them are free and some have usage restrictions.

In order to correctly configure OpenKM to use a thesaurus the following configuration properties must be set:

PropertyDescription

kea.thesaurus.owl.file

The ontology file ( Web ontology file )

vocabulary/file.owl

kea.thesaurus.base.url

The base URL.

http://www.someweb.org

kea.thesaurus.tree.root

Query to get the first node.

SELECT DISTINCT UID, TEXT FROM {UID} Y {OBJECT}, {UID} rdfs:label {TEXT} ; [rdfs:subClassOf {CLAZZ}] where not bound(CLAZZ)
 and lang(TEXT)="en" USING NAMESPACE foaf=<http://xmlns.com/foaf/0.1/>, dcterms=<http://purl.org/dc/terms/>,
 rdf=<http://www.w3.org/1999/02/22-rdf-syntax-ns#>, owl=<http://www.w3.org/2002/07/owl#>, rdfs=<http://www.w3.org/2000/01/rdf-schema#>,
 skos=<http://www.w3.org/2004/02/skos/core#>, dc=<http://purl.org/dc/elements/1.1/>

kea.thesaurus.tree.children

Query to get children node.

SELECT DISTINCT UID, TEXT FROM {UID} rdfs:subClassOf {CLAZZ}, {UID} rdfs:label {TEXT} where xsd:string(CLAZZ) =
 "RDFparentID" and lang(TEXT)="en" USING NAMESPACE foaf=<http://xmlns.com/foaf/0.1/>, dcterms=<http://purl.org/dc/terms/>,
 rdf=<http://www.w3.org /1999/02/22-rdf-syntax-ns#>, owl=<http://www.w3.org/2002/07/owl#>, rdfs=<http://www.w3.org/2000/01/rdf-schema#>,
 skos=<http://www.w3.org/2004/02/skos/core#>, dc=<http://purl.org/dc/elements/1.1/>

Take a look a full configuration example at Creating your own thesaurus.

Some interesting URL: