small problem in the way jena generates the context for jsonld-java

[François-Paul Servant]

Hi,

I had opened an issue on jsonld-java:

https://github.com/jsonld-java/jsonld-java/issues/170

but I closed it, because it turns out that the problem is within jena (see 
comments about the issue for an explanation), class JsonLDWriter, around line 
150:

                } else if ( o.isLiteral() ) {
                    String literalDatatypeURI = o.getLiteralDatatypeURI() ;
                    if ( literalDatatypeURI != null ) {
                        // add property as a typed attribute (the object is a
                        // typed literal)
                        Map<String, Object> x2 = new LinkedHashMap<>() ;
                        x2.put("@id", p.getURI()) ;

// Not setting the @type with literalDatatypeURI solves the problem
// At least, don’t do it when it is langString

                        if 
(!RDF.langString.getURI().equals(literalDatatypeURI)) { 
                                x2.put("@type", literalDatatypeURI) ; 
                        } 

                        ctx.put(x, x2) ;
                    } else {
                        // add property as an untyped attribute (the object is
                        // an untyped literal)
                        ctx.put(x, p.getURI()) ;
                    }

Best,

fps