Difference between revisions of "Thesaurus"

Latest revision as of 14:07, 12 February 2014

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.

Thesaurus is only available starting from OpenKM 5.0.

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:

kea.thesaurus.owl.file
kea.thesaurus.base.url
kea.thesaurus.tree.root
kea.thesaurus.tree.childs

Set OWL file

kea.thesaurus.owl.file=vocabulary/file.owl

Set base url

kea.thesaurus.base.url=http://www.someweb.org

Query to get root node

kea.thesaurus.tree.root=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/>

Query to get childs node

kea.thesaurus.tree.childs=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/>

You could be interested in:

Also check Thesaurus full example for a step-by-step guide.

@@ Line 5: / Line 5: @@
 {{Warning|Thesaurus is only available starting from OpenKM 5.0.}}
-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 term you can take a look at http://en.wikipedia.org/wiki/Thesaurus.
+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.
-{{Note|OpenKM can working with thesaurus defined in '''.owl''' and '''.rdfs''' formats.}}
+{{Note|OpenKM can work with thesaurus defined in '''.owl''' and '''.rdfs''' formats.}}
-There's a great utility http://protege.stanford.edu/ to create and maintaining your own thesaurus. In Internet can be found specific thesaurus, for example [http://aims.fao.org/website/AGROVOC-Thesaurus/sub Agrovoc] ( FAO ), [http://www.sti.nasa.gov/thesfrm1.htm NASA Thesuarus], [http://www2.ulcc.ac.uk/unesco/ UNESCO Thesaurus], [http://redined.r020.com.ar/es/index.php?tema=55 Public administration Thesaurus] among others. Someones are free and others have some usage restrictions.
+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, [http://aims.fao.org/website/AGROVOC-Thesaurus/sub Agrovoc] ( FAO ), [http://www.sti.nasa.gov/thesfrm1.htm NASA Thesaurus], [http://www2.ulcc.ac.uk/unesco/ UNESCO Thesaurus], [http://redined.r020.com.ar/es/index.php?tema=55 Public administration Thesaurus] among others. Some of them are free and some have usage restrictions.
-In order to configure correctly OpenKM thesaurus you must set this OpenKM.cfg entries:
+In order to correctly configure OpenKM to use a thesaurus the following configuration properties must be set:
 <source lang="java">
@@ Line 20: / Line 20: @@
 </source>
-=== Set OWL file ===
+'''Set OWL file'''
 <source lang="java">
-kea.thesaurus.owl.file=/vocabulary/file.owl
+kea.thesaurus.owl.file=vocabulary/file.owl
 </source>
-== Set base url ==
+'''Set base url'''
 <source lang="java">
 kea.thesaurus.base.url=http://www.someweb.org
 </source>
-== Query to get root node ==
+'''Query to get root node'''
 <source lang="java">
 kea.thesaurus.tree.root=SELECT DISTINCT UID, TEXT FROM {UID} Y {OBJECT}, {UID} rdfs:label {TEXT} ; [rdfs:subClassOf {CLAZZ}] where not bound(CLAZZ)
@@ Line 38: / Line 38: @@
 </source>
-== Query to get childs node ==
+'''Query to get childs node'''
 <source lang="java">
 kea.thesaurus.tree.childs=SELECT DISTINCT UID, TEXT FROM {UID} rdfs:subClassOf {CLAZZ}, {UID} rdfs:label {TEXT} where xsd:string(CLAZZ) =
@@ Line 48: / Line 48: @@
 You could be interested in:
 * [http://thesauri.cs.vu.nl/ A Method for Converting Thesauri to RDF/OWL]
+* [http://owl.cs.manchester.ac.uk/owltoskos/ OWL to SKOS online conversor]
+* [http://www.ebusiness-unibw.org/tools/skos2owl/ SKOS to OWL online conversor]
 * [http://www.w3.org/2004/02/skos/ SKOS Simple Knowledge Organization System]

Difference between revisions of "Thesaurus"

Latest revision as of 14:07, 12 February 2014

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