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<book xmlns:xhtml="http://www.w3.org/1999/xhtml"><title>NXTdoc</title><sidebar id="staticlinks"><para><xhtml:a href="http://groups.inf.ed.ac.uk/nxt/">NXT Home</xhtml:a>
	 <xhtml:a href="http://groups.inf.ed.ac.uk/nxt/search.shtml">Search</xhtml:a>
	 <xhtml:a href="http://groups.inf.ed.ac.uk/nxt/documentation/pdf/documentation.pdf">Download doc as PDF</xhtml:a></para></sidebar><sidebar id="navigation"><itemizedlist><listitem><para><xhtml:a href="docintro.xml">A Basic Introduction to the  NITE XML Toolkit</xhtml:a></para></listitem><listitem><para><xhtml:a href="docinstall.xml">Downloading and Using NXT</xhtml:a></para></listitem><listitem><para><xhtml:a href="docdata.xml">Data</xhtml:a></para></listitem><listitem><para><xhtml:a href="docnql.xml" current="yes">The NXT Query Language (NQL)</xhtml:a><itemizedlist><listitem><para><xhtml:a href="docquery_structure.xml">General structure of a simple query
</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_property_tests.xml">Property tests</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_comments.xml">Comments</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_structural_relations.xml"> Structural relations</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_temporal_relations.xml"> Temporal relations</xhtml:a></para></listitem><listitem><para><xhtml:a href="docnql_quantifier.xml">Quantifier</xhtml:a></para></listitem><listitem><para><xhtml:a href="docqueryresults.xml">Query results</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_complex.xml">Complex queries</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_known_issues.xml">Known Problems</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_helpful_hints.xml">Helpful hints</xhtml:a></para></listitem><listitem><para><xhtml:a href="docquery_related_doc.xml">Related documentation</xhtml:a></para></listitem></itemizedlist></para></listitem><listitem><para><xhtml:a href="docanalysis.xml">Analysis</xhtml:a></para></listitem><listitem><para><xhtml:a href="docguis.xml">Graphical user interfaces</xhtml:a></para></listitem><listitem><para><xhtml:a href="docothertools.xml">Using NXT in conjunction with other tools</xhtml:a></para></listitem><listitem><para><xhtml:a href="docfaq.xml">FAQ</xhtml:a></para></listitem><listitem><para><xhtml:a href="dochowtousemetadata.xml">How To Use Metadata</xhtml:a></para></listitem><listitem><para><xhtml:a href="doccomparison.xml">Comparison to other efforts</xhtml:a></para></listitem><listitem><para><xhtml:a href="docpubsandinfo.xml">Information and Further Reading</xhtml:a></para></listitem></itemizedlist></sidebar><article><section id="nql" xreflabel="The NXT Query Language"><title>The NXT Query Language (NQL)</title><mediaobject><imageobject><xhtml:img src="images/nite_nxt_search.jpg"/></imageobject></mediaobject><para><package>NXT</package> has its own query language: the <package>NXT Query Language</package>, or 
	<package>NQL,</package>. In this section, we describe <package>NQL</package>, list its operators, and 
	give example queries.
</para></section></article></book>
