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| <h1 class="title">Support Request</h1> |
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| <main class="d-flex flex-xl-row flex-column"> |
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| <aside class="text-muted align-self-start mb-3 p-0 d-xl-none d-block"> |
| <h2 class="h6 sticky-top m-0 p-2 bg-body-tertiary">On this page</h2> |
| <nav id="TableOfContents"> |
| <ul> |
| <li> |
| <ul> |
| <li><a href="#parse-errors">Parse Errors</a></li> |
| <li><a href="#execution-failure">Execution failure</a></li> |
| <li><a href="#unexpected-results">Unexpected results</a></li> |
| <li><a href="#reports">Reports</a></li> |
| </ul> |
| </li> |
| </ul> |
| </nav> |
| </aside> |
| <article class="flex-column me-lg-4"> |
| <h1 id="writing-a-support-request">Writing a Support Request</h1> |
| <p>A good support request or bug report is clear and concise. For ARQ, |
| reduce the problem to a short dataset (20 triples should be enough; |
| Turtle, N3 or N-triples preferred) and a query that illustrates the |
| problem. State what you expected to happen as well as what did |
| happen.</p> |
| <p>It also a good idea to check the documentation.</p> |
| <ul> |
| <li><a href="faq.html">ARQ FAQ</a></li> |
| <li><a href="index.html">ARQ Documentation</a></li> |
| </ul> |
| <h3 id="parse-errors">Parse Errors</h3> |
| <p>The SPARQL parser outputs a line and column number - it is usually |
| correct in identifying the first point of a syntax error.</p> |
| <h3 id="execution-failure">Execution failure</h3> |
| <p>If you are reporting a failure that produces a stack trace, please |
| include the message, exception and the stack trace. Only if it is |
| very long, should you truncate the trace but please include the |
| whole trace to the point where it indicates it is entering ARQ (a |
| package name starting <code>org.apache.jena.query</code>) and then one level |
| which is your code.</p> |
| <h3 id="unexpected-results">Unexpected results</h3> |
| <p>If you are getting unexpected results, show the results you expect |
| as well as what you actually get.</p> |
| <p>If you are getting no results, or less than you expected, try |
| cutting parts out of the query until something changes.</p> |
| <p>There are various formatters for result sets included in ARQ. |
| Print your results in text form if possible. There is a |
| <a href="http://www.w3.org/2001/sw/DataAccess/tests/README.html">testing format</a> |
| used by the Data Access Working Group and that is used for the |
| scripted tests in the distribution.</p> |
| <h3 id="reports">Reports</h3> |
| <p>A bug report or support request should be <strong>complete</strong> and |
| <strong>minimal</strong>. It helps you to develop a concise description of the |
| problem - often, you will discover the solution yourself.</p> |
| <p><em>Complete</em> means that any query included should include prefixes |
| and the whole syntax string, not a fragment. Any program code |
| should be ready to run, not a fragment of a large program.</p> |
| <p><em>Minimal</em> means that the data sent should be an abbreviated |
| selection to illustrate the point.</p> |
| <p>Typically, any program will be less that 20 lines, and any data |
| less than 20 triples.</p> |
| <p>The report should also include details of the execution |
| environment:</p> |
| <p>Environment:</p> |
| <ul> |
| <li>ARQ version</li> |
| <li>Java version</li> |
| <li>Operating system</li> |
| <li>What’s the CLASSPATH?</li> |
| </ul> |
| <p>How are you running the query?</p> |
| <ul> |
| <li>Are you running in an application server? Which one?</li> |
| <li>Have you used the command line tools?</li> |
| </ul> |
| <p>Data:</p> |
| <ul> |
| <li>Does your data parse as RDF?</li> |
| <li>Are you querying an inference model?</li> |
| </ul> |
| <p>Query:</p> |
| <ul> |
| <li>Have you printed out the query exactly as it is (especially if |
| the string has been assembled in by java code)? It is a good idea |
| to print the query out after building it programmatically.</li> |
| <li>Have you passed the query through the |
| <a href="cmds.html#arq.qparse">SPARQL syntax checker</a>? |
| <code>java -cp ... arq.qparse 'your query'</code></li> |
| </ul> |
| <p>Bug reports should be sent to the |
| <a href="mailto:users@jena.apache.org">mailto:users@jena.apache.org</a> |
| (you need to subscribe to send to this list).</p> |
| <p><a href="index.html">ARQ documentation index</a></p> |
| |
| </article> |
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| <li><a href="#execution-failure">Execution failure</a></li> |
| <li><a href="#unexpected-results">Unexpected results</a></li> |
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