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383 lines
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383 lines
13 KiB
HTML
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<title>Rasqal RDF Query Library - Rasqal RDF parser utility</title>
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<h1>Rasqal RDF Query Library - Rasqal RDF parser utility</h1>
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<a name="NAME"></a>
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<h2>NAME</h2>
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<p>roqet − Rasqal RDF query utility</p>
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<h2>SYNOPSIS</h2>
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<p><b>roqet</b> [<b>OPTIONS</b>] <i><query-URI> [base-URI]</i><b><br />
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roqet</b> [<b>OPTIONS</b>]<b>-e</b> <i>query-string [base-URI]</i></p>
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<h2>EXAMPLE</h2>
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<pre>
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<b>roqet example.sparql
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roqet -q -i rdql x.rdql http://example.org/base/
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roqet -i sparql -r xml http://example.org/query.rq
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<h2>DESCRIPTION</h2>
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<p>The <b>roqet</b> utility allows querying of RDF content using the <b>Rasqal</b> RDF query library, printing the results in variable bindings, RDF graph or boolean format. The query is read from <i>query-URI</i> and the optional <i>base-URI</i> is used as the base URI of the query if present.</p>
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<a name="MAIN_OPTIONS"></a>
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<h2>MAIN OPTIONS</h2>
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<p>roqet uses the usual GNU command line syntax, with long options starting with two dashes (‘-’) if supported by the getopt_long function. Otherwise only the short options are available.</p>
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<p><b>−e, −−exec QUERY</b></p>
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<p>Execute the query in the argument <i>QUERY</i> instead of reading the query from a URI (when -e is not given).</p>
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<p><b>−i, −−input LANGUAGE</b></p>
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<p>Set the input query <i>LANGUAGE</i> to one of’sparql’ (SPARQL Query Language for RDF, default) or ’rdql’ (RDF Data Query Language). The list of supported languages is given in the help summary given by −h.</p>
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<p><b>−r, −−results FORMAT</b></p>
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<p>Set the query results format.</p>
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<p>For variable bindings, the values of <i>FORMAT</i> vary upon what Rasqal supports but include ’simple’ for a simple text format (default), ’xml’ for the SPARQL Query Results XML format and ’json’ for a JSON version of the results.</p>
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<p>For RDF graph results, the values of <i>FORMAT</i> are ’ntriples’ (N-Triples, default), ’rdfxml-abbrev’ (RDF/XML Abbreviated), ’rdfxml’ (RDF/XML), ’turtle’ (Turtle), ’json’ (RDF/JSON resource centric), ’json-triples’ (RDF/JSON triples) or ’rss-1.0’ (RSS 1.0, also an RDF/XML syntax).</p>
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<p>The exact list of formats depends on what libraptor(3) was built with but is given correct in the usage message with −h.</p>
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<a name="OTHER_OPTIONS"></a>
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<h2>OTHER OPTIONS</h2>
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<p><b>−c, −−count</b></p>
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<p>Only count the triples and produce no other output.</p>
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<p><b>−D, −−data URI</b></p>
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<p>Add RDF data source URI (not a named graph)</p>
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<p><b>−d, −−dump−query FORMAT</b></p>
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<p>Print the parsed query out in a given <i>FORMAT</i> one of ’debug’, ’structure’ or ’sparql’</p>
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<p><b>−f, −−feature NAME(=VALUE)</b></p>
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<p>Set query feature <i>NAME</i> to the <i>VALUE</i> or integer 1 if omitted. The known features can be shown with <b>-f help</b> or <b>--feature help</b>.</p>
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<p><b>−G, −−named URI</b></p>
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<p>Add RDF data source URI (named graph)</p>
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<p><b>−h, −−help</b></p>
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<p>Show a summary of the options.</p>
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<p><b>−n, −−dryrun</b></p>
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<p>Prepare the query but do not execute it.</p>
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<p><b>−q, −−quiet</b></p>
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<p>No extra information messages.</p>
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<p><b>−s, −−source URI</b></p>
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<p>Ad RDF data source URI (named graph)) <i>URI</i> by adding it to the list of query data source URIs. <i>FORMAT</i> to ’simple’ (default) or ’xml’ (an experimental XML format)</p>
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<p><b>−v, −−version</b></p>
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<p>Print the rasqal library version and exit.</p>
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<p><b>−w, −−walk-query</b></p>
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<p>Walk the query and display it using the API.</p>
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<h2>CONFORMING TO</h2>
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<p><i>SPARQL Query Language for RDF</i>, Eric Prud’hommeaux and Andy Seaborne (eds), W3C Recommendation, 15 January 2008. <a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/">http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/</a></p>
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<p><i>SPARQL Query Results XML Format</i>, Jeen Broekstra and Dave Beckett (eds), W3C Recommendation, 15 January 2008. <a href="http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115/">http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115/</a></p>
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<p><i>RDQL - A Query Language for RDF</i>, Andy Seaborne, W3C Member Submission 9 January 2004 <a href="http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/">http://www.w3.org/Submission/2004/SUBM-RDQL-20040109/</a></p>
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<a name="SEE_ALSO"></a>
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<h2>SEE ALSO</h2>
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<p><b>librasqal(3),</b>rasqal-config(1),<b>libraptor(3)</b></p>
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<a name="CHANGES"></a>
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<h2>CHANGES</h2>
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<a name="AUTHOR"></a>
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<h2>AUTHOR</h2>
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<p>Dave Beckett - <a href="http://www.dajobe.org/">http://www.dajobe.org/</a></p>
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<hr />
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<p>Copyright 2002-2008 <a href="http://purl.org/net/dajobe/">Dave Beckett</a><br />2002-2005 <a href="http://www.bristol.ac.uk/">University of Bristol</a></p>
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