Incorrect use of qb:DataSet (Class) where qb:dataSet (Property) is meant

[esthervanenckevort]

Describe the bug
We are using qb:DataSet as a predicate, while this should be qb:dataSet (notice lowercase d).

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://emx2.dev.molgenis.org/catalogue_demo/api/rdf/Datasets'
2. Search for 'qb:DataSet'

Expected behavior
We use qb:DataSet to refer back from an item in the dataset to the dataset as a whole. The thing that we refer to with qb:dataSet is an instance of qb:DataSet.

Actual Result

Catalogue_demo:Datasets a owl:Class;
  rdfs:subClassOf qb:DataSet, sio:SIO_000754, owl:Thing;
  rdfs:label "Datasets";
  dcterms:description "Definition of a dataset within a (common) data model"@en .

<https://emx2.dev.molgenis.org:443/catalogue_demo/api/rdf/Datasets?resource=ANAGRAFICA&name=ANAGRAFICA>
  a Catalogue_demo:Datasets, sio:SIO_001187, qb:Observation;
  qb:DataSet Catalogue_demo:Datasets;
  <https://emx2.dev.molgenis.org:443/catalogue_demo/api/rdf/Datasets/column/resource>
    <https://emx2.dev.molgenis.org:443/catalogue_demo/api/rdf/ExtendedResources/ANAGRAFICA>;
  <https://emx2.dev.molgenis.org:443/catalogue_demo/api/rdf/Datasets/column/name> "ANAGRAFICA";
  <https://emx2.dev.molgenis.org:443/catalogue_demo/api/rdf/Datasets/column/sinceVersion>
    "1.0" .