ResultSetFactory.makeResults() does not recognize ASK result?

Thu, 02 Apr 2020 14:33:31 -0700 

Hi,

I'm trying to create a ResultSet from a boolean using
ResultSetGraphVocab (as I haven't found a simpler way):

    Model m = ModelFactory.createDefaultModel();
    m.createResource().
        addProperty(RDF.type, ResultSetGraphVocab.ResultSet).
        addLiteral(ResultSetGraphVocab.p_boolean, true);

    ResultSetFormatter.asXMLString(ResultSetFactory.makeResults(m));

What I get is:

<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#";>
  <head>
  </head>
  <results>
  </results>
</sparql>

What I expect to get is:

<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#";>
  <head></head>
  <boolean>true</boolean>
</sparql>

as per

https://www.w3.org/TR/2013/REC-sparql11-query-20130321/#ask
and
https://www.w3.org/2001/sw/DataAccess/tests/#spec-10-5

Is there an error or is this a bug?


Martynas

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