Can I set RIO-created JSON-LD parser to version 1.1 processing mode?

[pmcb55]

Hi,

I'm just trying to parse some JSON-LD, but getting the error: com.github.jsonldjava.core.JsonLdError: invalid term definition: 1.1.

I think the problem is that I need to tell the JSON-LD parser to use version 1.1 processing mode (and I suspect something to do with pruning BNodes, which my sample JSON-LD does indeed contain), but my question is: can I set the JSON-LD processing mode when using RDF4J to create the parser for me (i.e., Rio.createParser(format))?

Here's my sample code (which works fine on 'simple' JSON-LD):

package com.inrupt.sdk;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Optional;

import org.eclipse.rdf4j.rio.RDFFormat;
import org.eclipse.rdf4j.rio.RDFParser;
import org.eclipse.rdf4j.rio.RDFWriter;
import org.eclipse.rdf4j.rio.Rio;

/**
 * RDF Converter (currently always converts to Trig).
 *
 */
public class RdfConverter 
{
    static final String baseUrl = "http://test.com/base/";

    public static void main( String[] args ) {
        if (args.length < 2) {
            System.out.println("No input and output filenames provided!");
            System.out.println("Usage: rdf-converter <input-filename> <output-filename>");
            System.exit(-1);
        }

        final String inputFilename = args[0];
        final String outputFilename = args[1];

        System.out.printf("Input file [%s], output file [%s]...\n", inputFilename, outputFilename);
        File inputFile = new File(inputFilename);
        try (InputStream input = new FileInputStream(inputFile)) {
            final Optional<RDFFormat> format = Rio.getParserFormatForFileName(inputFilename);
            if (format.isPresent()) {
                System.out.printf("Input file format determined as: [%s]\n",
                        format.get().getName());
                final RDFParser rdfParser = Rio.createParser(format.get());
                RDFWriter rdfWriter = Rio.createWriter(RDFFormat.TRIG,
                        new FileOutputStream(outputFilename));

                rdfParser.setRDFHandler(rdfWriter);

                // I *think* I need to set JSON-LD processing mode to version 1.1, but how to set
                // that on my parser instance...!?
//                JsonLdOptions options = new JsonLdOptions();
//                options.setProcessingMode(JsonLdOptions.JSON_LD_1_1);
//                rdfParser.setPruneBlankNodeIdentifiers(true);

                rdfParser.parse(input, baseUrl);
            }
        } catch (Exception ex) {
            System.out.printf("Error trying to process input file [%s], error: [%s].\nCause: [%s]",
                    inputFilename, ex.getLocalizedMessage(), ex.getCause());
            System.exit(-1);
        }
    }
}

...and here's the sample JSON-LD that I'm trying to parse:

{
  "type": [
    "VerifiableCredential",
    "EducationalOccupationalCredential"
  ],
  "issuer": {
    "id": "did:key:z6MkkCxCJVxCyiRqYKoM3xF65ycjscvabT8zeH8WZ7HFhgxT",
    "name": "Test University"
  },
  "issuanceDate": "2021-06-02T14:16:45.788Z",
  "credentialSubject": {
    "id": "did:web:vcalice.example.net",
    "givenName": "Tommy",
    "familyName": "VC Alice",
    "type": "EducationalOccupationalCredential",
    "name": null,
    "startDate": "2017/08/01",
    "credentialCategory": "Degree",
    "educationalLevel": "1.1",
    "alumniOf": "Test University",
    "endDate": "2020/03/01"
  },
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    {
      "@vocab": "https://w3id.org/security/undefinedTerm#"
    },
    "https://schema.org",
    "https://w3id.org/vc-revocation-list-2020/v1"
  ],
  "credentialStatus": {
    "id": "https://test.vii.mattr.global/core/v1/revocation-lists/d176fb83-cabc-42da-9533-c315a49f375c#31",
    "type": "RevocationList2020Status",
    "revocationListIndex": "31",
    "revocationListCredential": "https://test.vii.mattr.global/core/v1/revocation-lists/d176fb83-cabc-42da-9533-c315a49f375c"
  },
  "proof": {
    "type": "Ed25519Signature2018",
    "created": "2021-06-02T14:16:46Z",
    "jws": "eyJhbGciOiJFZERTQSIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19..z0_aQTr7GM5H3kBFy5RBfIc-759gMi1X9chUjLDjIBfZUq0OTBkcs9Jvrze7VrgmsHnbt-Ew2sieQnHvkcOuDQ",
    "proofPurpose": "assertionMethod",
    "verificationMethod": "did:key:z6MkkCxCJVxCyiRqYKoM3xF65ycjscvabT8zeH8WZ7HFhgxT#z6MkkCxCJVxCyiRqYKoM3xF65ycjscvabT8zeH8WZ7HFhgxT"
  }
}

[barthanssens]

Hi,

hmz indeed, currently there is no setting to pass the processing mode to the underlying jsonld-java library, though it should be easy to add...
That being said, the jsonld-java library v0.13.3 does not seem to support much JSON-LD 1.1 features (work in progress apparently)