How to convert JSON array to RDF in Java?

Question

I want to convert a JSON (not JSON-LD) array to RDF in Java. I have seen similar posts to the forum but not exact answer. The JSON array contains objects and arrays, somethi

Answer 1

You could define a proper @context and use any JSON-LD converter to create any RDF serialization. Find Java example here and here.

Example

{
"@context":{
"results":{
  "@id":"info:stack/49365220/results",
  "@container":"@list"
},
"record_id":{
  "@id":"info:stack/49365220/record_id"
}, 
"gender":{
  "@id":"info:stack/49365220/gender"
}, 
"age":{
  "@id":"info:stack/49365220/age"
},
"demographics":{
  "@id":"info:stack/49365220/demographics"
}
},
"results": [
  {
     "record_id": "3d87f4df-f17e-4632-9449",
     "demographics": { "gender":"female", "race":"", "age":20 }
  },
  {
     "record_id": "ec5ca92d-865a-431f-9984",
     "demographics": { "gender":"male", "age":118 }
  },
  {
     "record_id": "0a79ecf0-83d8-4148-9054",
     "demographics": { "gender":"female", "age":118 }
  },
  {
     "record_id": "229276f8-1893-480b-b6e7",
     "demographics": { "gender":"female", "age":35 }
  },
  {
     "record_id": "0574cc3b-fb9c-495f-851c",
     "demographics": { "gender":"female", "age":40 }
  },
  {
     "record_id": "f3ccfdf6-231e-4a3e-bee0",
     "demographics": { "gender":"male", "age":118 }
  }
   ]
}

When putting this to Json-Ld Playground (or any other RDF tool) you can produce something like this:

serialized as N-TRIPLE

_:b0  _:b13 .
_:b1  _:b2 .
_:b1  "3d87f4df-f17e-4632-9449" .
_:b10  "40"^^ .
_:b10  "female" .
_:b11  _:b12 .
_:b11  "f3ccfdf6-231e-4a3e-bee0" .
_:b12  "118"^^ .
_:b12  "male" .
_:b13  _:b1 .
_:b13  _:b14 .
_:b14  _:b3 .
_:b14  _:b15 .
_:b15  _:b5 .
_:b15  _:b16 .
_:b16  _:b7 .
_:b16  _:b17 .
_:b17  _:b9 .
_:b17  _:b18 .
_:b18  _:b11 .
_:b18   .
_:b2  "20"^^ .
_:b2  "female" .
_:b3  _:b4 .
_:b3  "ec5ca92d-865a-431f-9984" .
_:b4  "118"^^ .
_:b4  "male" .
_:b5  _:b6 .
_:b5  "0a79ecf0-83d8-4148-9054" .
_:b6  "118"^^ .
_:b6  "female" .
_:b7  _:b8 .
_:b7  "229276f8-1893-480b-b6e7" .
_:b8  "35"^^ .
_:b8  "female" .
_:b9  _:b10 .
_:b9  "0574cc3b-fb9c-495f-851c" .