[dotNetRDF-Develop] Issue CORE-340 has been added to a project you are monitoring.

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<p>The following issue has been added to a project that you are monitoring.</p>
<table border="0">
  <tr>
    <td width="90px" valign="top"><b>Title:</b></td>
    <td>GROUP_CONCAT fails on non-literal inputs</td>
  </tr>
  <tr>
    <td><b>Project:</b></td>
    <td>Core Library (dotNetRDF.dll)</td>
  </tr>
  <tr>
    <td><b>Created By:</b></td>
    <td>Rob Vesse</td>
  </tr>
  <tr>
    <td><b>Milestone:</b></td>
    <td>1.0.0</td>
  </tr>
  <tr>
    <td><b>Category:</b></td>
    <td>Query</td>
  </tr>
  <tr>
    <td><b>Priority:</b></td>
    <td>High</td>
  </tr>
  <tr>
    <td><b>Type:</b></td>
    <td>Bug</td>
  </tr>
  <tr>
    <td><b>Description:</b></td>
  </tr>
  <tr>
    <td colspan="2"><p>
	This <a href="http://answers.semanticweb.com/questions/21699/sparql-select-using-group_concat-column-retrieve-a-string-of-commas-only?page=1&amp;focusedAnswerId=21701#21701">question</a>&nbsp;highlights a bug in our implementation of GROUP_CONCAT in that it will only concatenate literals when it should be capable of concatenating a mixture of URIs and literals</p>
<p>
	E.g</p>
<p>
	The following returns nothing:</p>
<p>
	SELECT (GROUP_CONCAT(?s) AS ?subjects) WHERE { ?s ?p ?o }</p>
<p>
	Yet forcing things to be literals yields a result:</p>
<p>
	SELECT (GROUP_CONCAT(STR(?s)) AS ?subjects) WHERE { ?s ?p ?o }</p></td>
  </tr>
</table>
<p>
            More information on this issue can be found at
            <a href="http://www.dotnetrdf.org/tracker/Issues/IssueDetail.aspx?id=340" target="_blank">http://www.dotnetrdf.org/tracker/Issues/IssueDetail.aspx?id=340</a></p>
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        </p>