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digitalbazaar / pyld

JSON-LD processor written in Python
https://json-ld.org/
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Cannot recognize "defines" property in ontology #39

Open Mec-iS opened 9 years ago

Mec-iS commented 9 years ago

I have a context like:

 "@context": 
    {"dbpedia": "http://dbpedia.org/ontology/", 
     "rdfs": "http://www.w3.org/2000/01/rdf-schema#", 
     "owl": "http://www.w3.org/2002/07/owl#", 
     "@base": "<myurl>/astronomy", 
     "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#", 
     "skos": "http://www.w3.org/2004/02/skos/core#", 
     "schema": "https://schema.org/", 
     "defines": {"@reverse": "rdfs:isDefinedBy"}, 
   }

and then in the same JSON-LD a "defines" to set classes and properties:

 "@id": "",
 "@type": ['http://www.w3.org/2002/07/owl#Ontology']
 "defines" : [{
     "@id": <some_url>
 },...
 ]

I can correctly convert this same JSON-LD in the playground, but there is no way of making PyLD to print out in compacted or expanded mode the very same.

compacted = jsonld.compact(body, context)

returns only @id and @type of the ontology but anything else.

dlongley commented 9 years ago

Sorry for the slow response, extremely busy around here. Thanks for the bug report, we will look into this when we can.

dlongley commented 9 years ago

When running this:

import json
from pyld import jsonld

doc = {
    "@context": {
        "dbpedia": "http://dbpedia.org/ontology/",
        "rdfs": "http://www.w3.org/2000/01/rdf-schema#",
        "owl": "http://www.w3.org/2002/07/owl#",
        "@base": "http://myurl.com/astronomy",
        "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
        "skos": "http://www.w3.org/2004/02/skos/core#",
        "schema": "https://schema.org/",
        "defines": {"@reverse": "rdfs:isDefinedBy"}
    },
    "@id": "",
    "@type": ["http://www.w3.org/2002/07/owl#Ontology"],
    "defines" : [{"@id": "http://example.com"}]
}

result = jsonld.expand(doc);
print(json.dumps(result, indent=2))

It produces:

[
  {
    "@reverse": {
      "http://www.w3.org/2000/01/rdf-schema#isDefinedBy": [
        {
          "@id": "http://example.com"
        }
      ]
    }, 
    "@id": "http://myurl.com/astronomy", 
    "@type": [
      "http://www.w3.org/2002/07/owl#Ontology"
    ]
  }
]

If I change it to run compaction over the document with the same context:

result = jsonld.compact(doc, doc['@context']);
print(json.dumps(result, indent=2))

I get this:

{
  "@context": {
    "owl": "http://www.w3.org/2002/07/owl#", 
    "rdfs": "http://www.w3.org/2000/01/rdf-schema#", 
    "@base": "http://myurl.com/astronomy", 
    "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#", 
    "dbpedia": "http://dbpedia.org/ontology/", 
    "schema": "https://schema.org/", 
    "skos": "http://www.w3.org/2004/02/skos/core#", 
    "defines": {
      "@reverse": "rdfs:isDefinedBy"
    }
  }, 
  "@id": "astronomy", 
  "@type": "owl:Ontology", 
  "defines": {
    "@id": "http://example.com"
  }
}

What code are you running that is dropping the defines property? Are you including the context in the input?