php - Could not handle ?university dbpedia-owl:count in ARC2 -

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i'm using simple sparql query list of universities selected country. , of sparql code 

select ?name ?type     {   ?university                     <http://schema.org/collegeoruniversity>     { ?university  dbpedia-owl:country  dbpedia:france }     union     { ?university  dbpprop:country      dbpedia:france }     optional     { ?university  dbpprop:name         ?name          .          filter (langmatches(lang(?name), 'fr'))       }     optional     { ?university  dbpedia-owl:type     ?type          }

to show result in php side, i'm using arc2 library use php query sparql endpoints , generate html pages. steps doc ok.

here full php code sparql query server side:

<html>   <body>    <?php   include_once('semsol/arc2.php'); /* arc2 static class inclusion */     $dbpconfig = array(   "remote_store_endpoint" => "http://dbpedia.org/sparql",    );    $store = arc2::getremotestore($dbpconfig);     if ($errs = $store->geterrors()) {      echo "<h1>getremotesotre error<h1>" ;   }    $query = '         prefix     foaf:  <http://xmlns.com/foaf/0.1/>          prefix       dc:  <http://purl.org/dc/elements/1.1>         prefix      rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>         prefix  address:  <http://www.w3.org/addressing/schemes.html>         prefix     rdfs:  <http://www.w3.org/2000/01/rdf-schema#>         select ?name ?type               {                        ?university                      <http://schema.org/collegeoruniversity>                      { ?university  dbpedia-owl:country   dbpedia:france }                    union                      { ?university  dbpprop:country       dbpedia:france }                    optional                      { ?university  dbpprop:name          ?name          .                           filter (langmatches(lang(?name), 'fr'))        }                    optional                      { ?university  dbpedia-owl:type      ?type          }                      }              order ?name           ';     $rows = $store->query($query, 'rows'); /* execute query */    if ($errs = $store->geterrors()) {      echo "query errors" ;      print_r($errs);   }    /* display results in html table */   echo "<table border='1'>" ;   foreach( $rows $row ) { /* loop each returned row */          print "<tr><td>" .$row['l'] . "</td><td>" . $row['c']. "</td></tr>";   }   echo "</table>"    ?>   </body> </html>

but when run code on server side that's error handling

query errorsarray ( [0] => incomplete or invalid group graph pattern. not handle " ?university dbpedia-owl:count" in arc2_sparqlplusparser [1] => incomplete or invalid group graph pattern. not handle " { ?univers" in arc2_sparqlplusparser )

so there solution? many thanks

your query doesn't include prefixes dbpedia-owl, dbpedia or dbpprop. when use web service interactively, these defined automatically, when connect remotely, still need include them. can see full list of prefixes defined in browser.

i'd guess that's what's happening when dbpedia-owl:count realizes it's seen count, legal sparql keyword, , realizes dbpedia-owl: didn't make sense. (i'm not familiar arc's parser, though; guess.)

i expect may run issues doing:

$query = '...'fr'...';

i'm not php user, i'm not how that's handled, looks single quotes need escaped, or need use double quotes.


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