Remove duplicated imports

[andreea-pasare]

This replicates in all *.rdf files. Please see the output from the latest rc: ePO/implementation/ePO_core/owl_ontology/ePO_core.rdf at v4.2.0-rc.1 · OP-TED/ePO

In the image above we have the m8g namespace that comes from various core vocabularies prefixes: cccev, clv, cpov, etc.

[rousso]

@cristianvasquez Please label this as a bug if it is one.

[gkostkowski]

The issue was resolved (PR #216). The change will be included in the next model2owl release.

Solution details:
RDF/XML artefacts generated by model2owl are now post-processed using rdfpipe serializer. That serializer has been already used to generate TTL files and now is also used to restructure RDF/XML files. That ensures that the returned RDF/XML files don't contain the reported redundant owl:imports statements.

Using the serializer also results in a more compact RDF/XML files as the serializer represents data in the optimal way. The following excerpts shows the difference.

Former RDF/XML representation:

<owl:DatatypeProperty rdf:about="http://data.europa.eu/a4g/ontology#hasAbnormallyLowTenders"/>
<rdf:Description rdf:about="http://data.europa.eu/a4g/ontology#hasAbnormallyLowTenders">
  <skos:prefLabel xml:lang="en">Has abnormally low tenders</skos:prefLabel>
</rdf:Description>
<rdf:Description rdf:about="http://data.europa.eu/a4g/ontology#hasAbnormallyLowTenders">
  <skos:definition xml:lang="en">Tenders received that were found irregular and non-acceptable due to an abnormally low price or cost. Additional Information The definition implies that abnormally Low Tender Lots are Inadmissible Tender Lots. WG Approval 28/07/2020 (epo:SubmissionStatisticalInformation)</skos:definition>
</rdf:Description>
<rdf:Description rdf:about="http://data.europa.eu/a4g/ontology#hasAbnormallyLowTenders">
  <rdfs:isDefinedBy rdf:resource="http://data.europa.eu/a4g/ontology#core"/>
</rdf:Description>

New RDF/XML representation:

<rdf:Description rdf:about="http://data.europa.eu/a4g/ontology#hasAbnormallyLowTenders">
  <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#DatatypeProperty"/>
  <skos:prefLabel xml:lang="en">Has abnormally low tenders</skos:prefLabel>
  <skos:definition xml:lang="en">Tenders received that were found irregular and non-acceptable due to an abnormally low price or cost. Additional Information The definition implies that abnormally Low Tender Lots are Inadmissible Tender Lots. WG Approval 28/07/2020 (epo:SubmissionStatisticalInformation)</skos:definition>
  <rdfs:isDefinedBy rdf:resource="http://data.europa.eu/a4g/ontology#core"/>
</rdf:Description>