Christopher added a comment.

  it seems that with a CONSTRUCT query, sending an Accept: text/turtle works.
  
  http://wdm-rdf.wmflabs.org/short/NyJpTCnpl
  
  this is actually all that is required to get a linked data fragment from the 
SPARQL interface.
  
  The problem with TPF access to the WDQS SPARQL interface is that the very 
simple query (required for the metadataCallback)
  
    SELECT (COUNT(*) AS ?count) WHERE {?s ?p ?o}
  
  cannot return turtle.  Also, there seems to be a minor difference with the 
COUNT implementation in OpenVirtuoso, that allows a count to be unbound like:
  
    SELECT COUNT(*) WHERE {?s ?p ?o}

TASK DETAIL
  https://phabricator.wikimedia.org/T130799

EMAIL PREFERENCES
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To: Christopher
Cc: Smalyshev, Aklapper, Christopher, debt, Gehel, D3r1ck01, FloNight, Izno, 
jkroll, Wikidata-bugs, Jdouglas, aude, Deskana, Manybubbles, Mbch331



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