"Could not parse JSONLD" error when importing a JSON-LD file

Integrations Linked Data, RDF, Ontology
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1

Hi,
I'm trying to import a json-ld file into neo4j. I've installed the APOC and Neosemantic plugins to accomplish this but run into the following error: "Could not parse JSONLD".
What I've tried:

  • An inline data insertion per the example: Importing RDF Data - Neosemantics which worked just fine.
  • Converting the json-ld file to N-triples (through RDFLib, a Python library) and importing the output file also worked just fine.

Query used (edited path for privacy): call n10s.rdf.import.fetch("file:///C:\Users\neo4jeej\linked-art\200\0\2001000.json","JSON-LD");
Any suggestions on how to proceed with debugging? I've tried to go through logging but couldn't find any additional information in dbmss/{project hash}/logs.

Thank you in advance!

2

Hi @neo4jeej ,
Neosemantics uses the RDF4J parsers. I don't know if there are differences with the parsing that RDFLib does. A usual suspect is checks on URI's syntax but there may be others. Do you not find any additional information in the logs?

Alternatively, is there any chance you can share a fragment of your 2001000.json file so we can try to reproduce the issue and understand what's going on?

Cheers,

JB.

3

Hi @jesus_barrasa,
Thank you for your quick response!
I couldn't find anything in the logs but perhaps I'm looking in the wrong place? I tried looking in: .Neo4jDesktop\relate-data\dbmss\dbms-0b66f06c-886a-435a-a497-cb0ffa159d9c\logs
This is a sample file which I redacted slightly, unfortunately I can't freely share the project just yet.

{

"@context": "https://linked.art/ns/v1/linked-art.json",

"id": "https://{redacted}.net/2201",

"type": "Type",

"identified_by": [

    {

        "type": "Name",

        "content": "bord (vaatwerk)"

    },

    {

        "type": "Identifier",

        "content": "http://hdl.handle.net/10934/RM0001.THESAU.1",

        "classified_as": [

            {

                "id": "http://vocab.getty.edu/aat/300404621",

                "type": "Type",

                "_label": "repository numbers"

            }

        ],

        "identifier_assigned_by": [

            {

                "type": "AttributeAssignment",

                "carried_out_by": [

                    {

                        "id": "https://{redacted}.net/21018560",

                        "type": "Actor",

                        "_label": "{redacted} "

                    }

                ]

            }

        ]

    },

    {

        "type": "Name",

        "content": "plate (dishes)",

        "language": [

            {

                "id": "http://vocab.getty.edu/aat/300388277",

                "type": "Language",

                "_label": "English (language)"

            }

        ]

    },

    {

        "type": "Name",

        "content": "plate (dishes)",

        "language": [

            {

                "id": "http://vocab.getty.edu/aat/300388277",

                "type": "Language",

                "_label": "English (language)"

            }

        ]

    },

    {

        "type": "Name",

        "content": "bord (vaatwerk)"

    },

    {

        "type": "Identifier",

        "content": "http://hdl.handle.net/10934/RM0001.THESAU.1",

        "classified_as": [

            {

                "id": "http://vocab.getty.edu/aat/300404621",

                "type": "Type",

                "_label": "repository numbers"

            }

        ],

        "identifier_assigned_by": [

            {

                "type": "AttributeAssignment",

                "carried_out_by": [

                    {

                        "id": "https://{redacted}.net/21018560",

                        "type": "Actor",

                        "_label": "{redacted} "

                    }

                ]

            }

        ]

    }

],

"_label": "bord (vaatwerk)",

"equivalent": [

    "https://{redacted}.net/22064817",

    {

        "id": "http://vocab.getty.edu/aat/300042991",

        "type": "Type"

    }

]

}

4

Thanks for this @neo4jeej. I think I've found what's going on.

The JSON-LD parser in RDF4J does not support json-ld 1.1 processing mode. This happens to be used in the fragment you shared by referring to a remote context (see first line "@context": "https://linked.art/ns/v1/linked-art.json").
It may not be obvious but if you dereference the URI, you'll see that the context includes in the first line the version term definition that makes the parser choke:

{
  "@context": {
    "@version": 1.1,
    "crm": "http://www.cidoc-crm.org/cidoc-crm/",

Unfortunately, there's not much we can do on the n10s side at this point until this is supported in RDF4J :frowning:

Just to confirm the theory I've managed to successfully parse your document with n10s by replacing the reference to the remote context with the actual content excluding the @version element.

{

"@context":  {

"@version": 1.1,

 "crm": "http://www.cidoc-crm.org/cidoc-crm/", 
   ... whole document here ....
} ,

"id": "https://{redacted}.net/2201",

"type": "Type",

Even though it does not solve the problem, I hope it at least helps clarify what's happening.

Cheers,

JB.

1 Like
5

Hi @jesus_barrasa,
Thank you for diving into this! I'll keep an eye out for updates in RDF4J.
While it indeed didn't directly solve the issue, the clarification is much appreciated!
J

1 Like