@prefix dcterms: <http://purl.org/dc/terms/> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix qudt: <http://qudt.org/schema/qudt/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

qudt:xAxisDefinition a rdf:Property,
        owl:DatatypeProperty,
        owl:FunctionalProperty ;
    rdfs:label "X-Axis Definition" ;
    dcterms:description """
  The definition of the X-Axis could be an intersection, cross-product or other function of a  meridian or orbit. 
  It could also mention any aspects of rotation, for example, the rotation equator of the Earth, Sun, Moon or other celestial body. 
  An epoch might also be given.
  """ ;
    rdfs:isDefinedBy <http://qudt.org/3.2.0/schema/datatype>,
        <http://qudt.org/3.2.0/schema/shacl/datatype> ;
    rdfs:range xsd:string .