output ontologies as JSONLD

[VladimirAlexiev]

Use tricks from https://github.com/gs1/EPCIS/tree/master/Ontology#conversion-to-jsonld.
make jsonld
invokes commands like this

ttl2jsonld CGMES-NC/ttl/SteadyStateInstruction-AP-Voc-RDFS2020.ttl | \
  jsonld compact -c file://CIM-ontology-context.jsonld > CGMES-NC/jsonld/SteadyStateInstruction-AP-Voc-RDFS2020.jsonld

• deploy JSON-LD contexts on a permanent network location #110

Then I check for JSON-LD irregularities with a command like this;

grep -h '       "@' */*/*.jsonld|perl -pe 's{^ +}{}' |sort|uniq -c

Here are the exceptions, with issue listed:

• missing "multiplier isFixed" in NC #108 IMPORTANT

      1 "@id": "cim:CurrentFlow"
      1 "@id": "cim:Frequency"
      4 "@id": "cim:Money"
      1 "@id": "cim:ReactivePower"
      2 "@id": "cim:RealEnergy"

• cims:stereotype: string vs URL #104

   4035 "@id": "uml:attribute"
    886 "@id": "uml:concrete"
    184 "@id": "uml:enumeration"
     53 "@id": "uml:ofAggregate"

• fixes to Ontology metadata #32: open question about theme: "vocabulary"@en

     43 "@language": "en",
     29 "@value": "vocabulary"

• fix09-map-qkUnitsMultipliers-38.ru had cim:UnitMultiplier.none 1.0 (decimal), now fixed to 1E0 (double)

     19 "@type": "xsd:decimal",
     19 "@value": "1.0"

• terms without rdfs:comment #109

      1 "@value": "TapChangerControl"
      1 "@value": "TapChangerControlSchedule"
      2 "@value": "consumption"
      2 "@value": "export"
      2 "@value": "holiday"
      2 "@value": "import"
      2 "@value": "production"
      2 "@value": "storage"

[VladimirAlexiev]

I also check whether all URLs are properly shortened

grep -h '"http' */*/*.jsonld|sort|uniq -c|less

Breakdown of problems:

• merge and fix DatasetMetadata, Header, FileHeader #69 There are 2 dm prefixes but we can only declare one in JSONLD

@prefix dm:           <http://iec.ch/TC57/61970-552/DifferenceModel/1#> .
@prefix dm:           <https://ap-voc.cim4.eu/DatasetMetadata#> .

      1       "@id": "https://ap-voc.cim4.eu/DatasetMetadata#Ontology",
      1       "@id": "https://ap-voc.cim4.eu/DatasetMetadata#Package_DatasetMetadataProfile",
      1       "@id": "https://ap-voc.cim4.eu/DatasetMetadata#Package_DocDatasetMetadataProfile",
      1       "cims:belongsToCategory": "https://ap-voc.cim4.eu/DatasetMetadata#Package_DatasetMetadataProfile",

• I had cim:UnitMultiplier.none 1.0 (decimal), now fixed to 1E0 (double)

     19       "http://qudt.org/schema/qudt/prefixMultiplier": {

• Due to defining a prop as xsd:boolean loses its prefixed URL digitalbazaar/jsonld.js#558.
  Removed "owl:deprecated": {"@type": "xsd:boolean"} from context

     11       "http://www.w3.org/2002/07/owl#deprecated": true
      3       "http://www.w3.org/2002/07/owl#deprecated": true,

• These are expected:

     10       "dcat:landingPage": "https://www.entsoe.eu/digital/cim/cim-for-grid-models-exchange/",
     19       "dct:license": "https://www.apache.org/licenses/LICENSE-2.0",
      1       "owl:backwardCompatibleWith": "http://iec.ch/TC57/61970-453/DiagramLayout/2/1", ...
     10       "owl:incompatibleWith": "http://entsoe.eu/2009/profile1", ...
      1       "owl:priorVersion": "http://entsoe.eu/CIM/DiagramLayout/3/1", ...

[VladimirAlexiev]

This is largely done, see https://github.com/Sveino/Inst4CIM-KG/tree/develop/rdfs-improved/CGMES/jsonld.

• Leaving it open and assigning to Svein and Chavdar for the subtasks (checkboxes) above.
• Of them, deploy JSON-LD contexts on a permanent network location #110 is most important

They are all posted as separate issues, so we may as well close this one.