[JENA-1563] ResultSetReaderJSON does not accept "lang"+"datatype" on the same literal.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.7.0
• Fix Version/s: Jena 3.8.0
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 10/Jun/18 15:58
• Updated: 29/Jun/18 10:13
• Resolved: 16/Jun/18 10:32

Description

Reported by Philip Coates by email date 2018-06-08 on dev@.

Example:

{
  "xml:lang" : "en" ,
  "datatype" : "http://www.w3.org/1999/02/22-rdf-syntax-ns#langString" ,
  "type" : "literal" ,
  "value" : "phototaxis"
}

The "datatype" is not needed because "xml:lang" implies it. The RDF specs recommend that daatypes are not added when there is a language tag.

Jena can be lenient and accept this when "datatype" is rdf:langString (anything else is incorrect).

For reference: "datatype" xsd:string isn't necessary either but is accepted (it happens from RDF 1.0 systems).

Issue Links

• links to: GitHub Pull Request #435