Doesn't see we need this additional property that is a sub property of prov:wasDerivedFrom:
dco:sourceDataType
a owl:ObjectProperty ;
rdfs:comment "A data type may be derived from one or more existing data types." ;
rdfs:domain dco:DataType ;
rdfs:label "has source data type" ;
rdfs:range dco:DataType ;
rdfs:subPropertyOf prov:wasDerivedFrom .
Doesn't see we need this additional property that is a sub property of prov:wasDerivedFrom: