Some minor mostly technical (and not design) changes to the SKOS Core vocabulary:
- the XML doctype has been changed to 'rdf:RDF'
- the entity 'vs' has been added with value the vocab status namespace
- xmlns:vs added
- dct:modified date updated
- dc:title for the schema changed to 'SKOS Core RDF Vocabulary'
- dc:contributor added for members of public-esw-thes list
- rdfs:isDefinedBy property added for each term
- the initial XML comment at the top of the file has been rewritten