OM1 test: Ontology minimum metadata is declared

This check verifies if the following minimum metadata are present in the ontology metadata:

• title: declared using dc:title, dcterms:title or schema:name
• description: declared using dc:abstract, dcterms:abstract, dc:description, dcterms:description, schema:description, rdfs:comment, doap:description, doap:shortdesc or skos:note
• license: declared using dcterms:license, schema:license, doap:license or cc:license.
• version iri: declared using owl:versionIRI
• creator: declared using dc:creator, dcterms:creator, pav:createdBy, pav:authoredBy, schema:creator, prov:wasAttributedTo or doap:developer
• namespace URI: declared using vann:preferredNamespaceUri

The test will pass if all ontology metadata are present. The test will fail otherwise, indicating the properties that are missing.