This page is a collection of several different encodings of vocabulary terms using SKOS, demonstrating some differences in interpretation of how to encode a vocabulary. From an RDF point of view, these are semantically equivalent, and should work, but operationally this doesn't seem to be the case. More work is necessary to learn about the conditions necessary for true interoperability of SKOS-encoded vocaburies. A test of such interoperability would be to open, edit, and save a SKOS using several differnt tools, without any content loss or corruption.

AuScope

Generated from GeoSciML GeologicVocabulary, converted to SKOS using xslt by Simon Cox (https://www.seegrid.csiro.au/twiki/bin/view/CGIModel/SKOSEncodingForVoca... ):

<skos:ConceptScheme rdf:about="urn:cgi:classifierScheme:CGI:SimpleLithology:200811"/>

   <skos:Concept rdf:about="urn:cgi:classifier:CGI:SimpleLithology:200811:breccia">
        <skos:definition>Coarse-grained material composed of angular broken rock fragments; the fragments typically have sharp edges and unworn corners. The fragments may be held together by a mineral cement, or in a fine-grained matrix. Clasts may be of any composition or origin. Source: Neuendorf et al. 2005</skos:definition>
        <skos:prefLabel xml:lang="en">Breccia@en</skos:prefLabel>
        <skos:prefLabel xml:lang="fr">brèches@fr</skos:prefLabel>
        <skos:prefLabel xml:lang="it">breccia@it</skos:prefLabel>
        <skos:inScheme rdf:resource="urn:cgi:classifierScheme:CGI:SimpleLithology:200811"/>
        <skos:broader rdf:resource="urn:cgi:classifierScheme:CGI:SimpleLithology:200811:compound_material"/>
    </skos:Concept>

 TemaTres

From TemaTres . Specifically for breccia .

<skos:ConceptScheme rdf:nodeID="tematres">
<dc:title>SimpleLithology</dc:title>
<dc:creator>Stephen M. Richard</dc:creator>
<dc:subject>lithology</dc:subject>
<dc:description> lithology </dc:description>
<dc:publisher>Stephen M. Richard</dc:publisher>
<dc:date>2008-11-08</dc:date>
<dc:language>en</dc:language>
<skos:hasTopConcept rdf:nodeID="tema1"/>
</skos:ConceptScheme>

<skos:Concept rdf:nodeID="tema2">
<skos:prefLabel>Breccia</skos:prefLabel>
<skos:scopeNote>
 Coarse-grained material composed of angular broken rock fragments; the fragments typically have sharp edges and unworn corners.  The fragments may be held together by a mineral cement, or in a fine-grained matrix.  Clasts may be of any composition or origin.
</skos:scopeNote>
<skos:note> Neuendorf et al. 2005 </skos:note>
<skos:inScheme rdf:nodeID="tematres"/>
<skos:broader rdf:nodeID="tema1"/>
<dct:created>2009-06-24 15:55:05</dct:created>
<skos:subjectIndicator rdf:resource="http://vocabularyserver.com/lithology/index.php?tema=2"/>
</skos:Concept>

 ThManager

Unesco Thesarus term SKOS generated by ThManager . No concept Scheme. SKOS concept type assignment using rdf:type statement.

<rdf:Description rdf:about="http://iaaa.cps.unizar.es/thesaurus/HYDROBIOLOGY">
    <rdf:type rdf:resource="http://www.w3.org/2004/02/skos/core#Concept"/>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/AQUACULTURE"/>
    <skos:prefLabel xml:lang="fr">HYDROBIOLOGIE</skos:prefLabel>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/ENVIRONMENTAL SCIENCES"/>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/AQUATIC PLANTS"/>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/VIRUSES"/>
    <skos:broader rdf:resource="http://iaaa.cps.unizar.es/thesaurus/BIOLOGY"/>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/MARINE BIOLOGY"/>
    <skos:inScheme rdf:resource="http://iaaa.unizar.es/thesaurus/UNESCO"/>
    <skos:prefLabel xml:lang="en">HYDROBIOLOGY</skos:prefLabel>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/AQUATIC ENVIRONMENT"/>
    <skos:narrower rdf:resource="http://iaaa.cps.unizar.es/thesaurus/LIMNOLOGY"/>
    <skos:prefLabel xml:lang="es">HIDROBIOLOGÍA</skos:prefLabel>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/AQUATIC ANIMALS"/>
    <skos:related rdf:resource="http://iaaa.cps.unizar.es/thesaurus/AQUATIC ECOSYSTEMS"/>
  </rdf:Description>

Protege

SKOS generated directly from P. Golodunuic XL2XML utility (https://twiki.auscope.org/twiki/bin/view/Grid/ExcelToRdfTool ), from crafted spreadsheet, and using the SKOS encoding approach by Simon Cox (https://www.seegrid.csiro.au/twiki/bin/view/CGIModel/SKOSEncodingForVoca... ),  can be opened in Protege (http://protege.stanford.edu/download/download.html ) and edited using the SKOS extension in Protege (http://protegewiki.stanford.edu/index.php/SKOS_Editor; https://twiki.auscope.org/twiki/bin/view/Grid/ProtegeConfigSKOS). When these are saved, the SKOS concepts are encoded in two ways, its not clear why Protege uses one or the other. They are logically equivalent.