change `conformsTo` and `license` URIs

[VladimirAlexiev]

er:Ontology 
  dcterms:license       "https://www.apache.org/licenses/LICENSE-2.0"@en ;
  dcterms:conformsTo
    "urn:iso:std:iec:61970-301:ed-7:amd1" , "urn:iso:std:iec:61970-600-2:ed-1" , "urn:iso:std:iec:61970-401:draft:ed-1" , "urn:iso:std:iec:61970-501:draft:ed-2" , 
    "file://CIM100_CGMES31v01_501-20v02_NC23v62_MM10v01.eap" , "file://iec61970cim17v40_iec61968cim13v13a_iec62325cim03v17a.eap" ;

• [ ] change the first 4 to URIs not strings
• [ ] the last two are not good because these file: URLs will be resolved as relative URLs (with a random base). Also, these are sources of the ontology, not standards the ontology conforms to

So I would change it as follows:

er:Ontology
   dcterms:conformsTo <urn:iso:std:iec:61970-301:ed-7:amd1> , <urn:iso:std:iec:61970-600-2:ed-1> , <urn:iso:std:iec:61970-401:draft:ed-1> , <urn:iso:std:iec:61970-501:draft:ed-2>;
  dct:source "CIM100_CGMES31v01_501-20v02_NC23v62_MM10v01.eap" , "iec61970cim17v40_iec61968cim13v13a_iec62325cim03v17a.eap" ;

• [ ] Also, change dcterms:license from langString to URL:

  dcterms:license       <https://www.apache.org/licenses/LICENSE-2.0> ;

[VladimirAlexiev]

The same holds for SHACL ontologies. Eg EquipmentReliability-AP-Con-Simple-SHACL.ttl:

@prefix er:      <https://ap-con.cim4.eu/EquipmentReliability-Simple/2.3#> .
er:Ontology  rdf:type         owl:Ontology;
  dcterms:conformsTo
    "file://iec61970cim17v40_iec61968cim13v13a_iec62325cim03v17a.eap" , "file://CIM100_CGMES31v01_501-20v02_NC23v62_MM10v01.eap" , 
    "urn:iso:std:iec:61970-401:draft:ed-1" , "urn:iso:std:iec:61970-301:ed-7:amd1" , "urn:iso:std:iec:61970-600-2:ed-1" , "urn:iso:std:iec:61970-501:draft:ed-2";
        dcterms:license       "https://www.apache.org/licenses/LICENSE-2.0"@en;