Is there a way to convert JSON-LD to N-Quads format?

Question

We have a requirement where we will be storing data in JSON-LD format for maintaining a catalog and data from the catalog will be pulled in batches to a graph database which supports the RDF data format. We have been looking at Cayley and DBgraph for this purpose, but these databases support N-Quads as their data format.

Is there a graph database which has the JSON-LD data format or is there a way to convert the JSON-LD format to the N-Quads/Turtle format?

Apache Jena, of course, is able to parse JSON-LD, see the docs — UninformedUser
– UninformedUser, Commented Jan 16, 2018 at 7:06
@AKSW we are in process of evaluating Cayley for building knowledge graph. Any suggestions or views on that? — Raghav salotra
– Raghav salotra, Commented Jan 16, 2018 at 7:30
Please note that tool recommendations is considered off-topic on StackOverflow. That said, most triplestores/frameworks/parsing toolkits should be able to do this. — Jeen Broekstra
– Jeen Broekstra, Commented Jan 17, 2018 at 7:56

Peter Mortensen · Accepted Answer · 2021-01-22 23:41:44Z

2

Converting JSON-LD to N-Quads (and back) are core algorithms described in the JSON-LD API specification. Any conforming JSON-LD processor supports this.

edited Jan 22, 2021 at 23:41

Peter Mortensen

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answered Jan 18, 2018 at 4:48

Gregg Kellogg

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Raghav salotra · Accepted Answer · 2018-02-20 10:00:47Z

0

Pyld provides an option to normalise jsonld to other RDF formats.

# normalize a document using the RDF Dataset Normalization Algorithm
# (URDNA2015), see: http://json-ld.github.io/normalization/spec/
normalized = jsonld.normalize(
    doc, {'algorithm': 'URDNA2015', 'format': 'application/nquads'})
# normalized is a string that is a canonical representation of the document
# that can be used for hashing, comparison, etc.

Below is the link:

https://github.com/digitalbazaar/pyld

answered Feb 20, 2018 at 10:00

Raghav salotra

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2 Comments

Ann Over a year ago

this doesn't seem to work when the doc has a remote context. Any idea how to solve it?

antonimmo Over a year ago

@Ann You might want to take a look into this section github.com/digitalbazaar/pyld#document-loader

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