[JENA-2344] Invalid JSON-LD context generated for CONSTRUCT query

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: Jena 4.1.0, Jena 4.5.0
• Component/s: ARQ, Fuseki, JSON-LD
• Assignee: Andy Seaborne
• Reporter: Stefan Bischof
• Created: 09/Aug/22 07:08
• Updated: 23/Apr/23 13:47
• Resolved: 09/Aug/22 13:31

Description

For URIs having a slash / in the fragment identifier an invalid JSON-LD context is generated.

 

Steps to reproduce:

1. Add a triple with with a slash in the fragment identifier to some graph, e.g., "[] <https://smart-data-models.github.io/data-models/terms.jsonld#/definitions/category> "meter" .
2. Retrieve the triple in a CONSTRUCT query, e.g., CONSTRUCT WHERE { ?s ?p ?o }
3. Set "Accept" header in HTTP call or "Content-Type (Graph)" in Fuseki WebUI
4. The context at the end of the response includes the invalid key "/definitions/category"

{
  "@id" : "_:b0",
  "/definitions/category" : "meter",
  "@context" : {
    "/definitions/category" :

{       "@id" : "https://smart-data-models.github.io/data-models/terms.jsonld#/definitions/category"     }

  }
}

 
Although I couldn't find a formal grammar for JSON-LD, the python parser I used and the parser on the JSON-LD playground https://json-ld.org/playground/ did not accept this: jsonld.SyntaxError: Invalid JSON-LD syntax; term in form of IRI must expand to definition.

I could replicate the same behaviour on the cli with ARQ 4.5.0.