...
//created root concept
<http://test/rootConcept> rdf:type skos:Concept .
<http://test/rootConcept> skos:inScheme <http://test> .
<http://test/rootConcept> skos:topConceptOf <http://test> .
<http://test/rootConcept> vb:hasStatus "Proposed" .
<http://test/rootConcept> dct:created "2016-06-24T14:53:49Z"^^xsd:dateTime .
<http://test/rootConcept> rdf:type skos:Concept .
<http://test/rootConcept> skos:inScheme <http://test> .
<http://test/rootConcept> skos:topConceptOf <http://test> .
<http://test/rootConcept> vb:hasStatus "Proposed" .
<http://test/rootConcept> dct:created "2016-06-24T14:53:49Z"^^xsd:dateTime .
//when the concept has been modified (e.g. by adding the definition, or with other info)
// pointers from the concept to its definition and pref label
<http://test/rootConcept> skos:definition <http://test/xDef_c2c16ad2> .
<http://test/rootConcept> skosxl:prefLabel <http://test/xl_en_f6428a2e> .
<http://test/rootConcept> skosxl:prefLabel <http://test/xl_en_f6428a2e> .
//when the concept has been modified (e.g. by adding the definition, or with other info)
// xLabel for the concept
...