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   6           cxml-rng: Relax NG for Closure XML
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  14             —
  15             <b> Relax NG for Closure XML</b>
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  19   <p>
  20     An implementation
  21     of <a href="http://relaxng.org/spec-20011203.html">Relax
  22       NG</a> schema validation
  23     written in Common
  24     Lisp, including support for compact syntax.
  25     <!--
  26     <a href="http://relaxng.org/compact-20021121.html">Compact
  27     Syntax</a>, and the XSD data type library are included.
  28     -->
  29   </p>
  30   <p>
  31     cxml-rng was written
  32     by <a href="mailto:david@lichteblau.com">David
  33       Lichteblau</a> and is designed as an add-on library for
  34     <a href="http://common-lisp.net/project/cxml">Closure XML</a>.
  35     It is available under an X11-style license.
  36   </p>
  37   <p>
  38     Please send bug reports
  39     to <a href="mailto:cxml-devel@common-lisp.net">
  40       cxml-devel@common-lisp.net</a>
  41     (<a href="http://common-lisp.net/cgi-bin/mailman/listinfo/cxml-devel">list information</a>).
  42   </p>
  43
  44   <h3>Download and Installation</h3>
  45
  46   <p>
  47     Download cxml-rng
  48     <a href="http://www.lichteblau.com/cxml-rng/download/">tarballs</a>
  49     or get it from git: <tt>http://www.lichteblau.com/git/cxml-rng.git</tt>
  50   </p>
  51   <p>
  52     cxml-rng needs
  53     <a href="http://common-lisp.net/project/cxml">Closure XML</a>,
  54     <a href="http://weitz.de/cl-ppcre/">CL-PPCE</a>,
  55     <a href="http://www.pps.jussieu.fr/~jch/software/cl-yacc/">CL-Yacc</a>,
  56     <a href="http://www.cliki.net/PARSE-NUMBER">parse-number</a>,
  57     and <a href="http://www.cliki.net/cl-base64">cl-base64</a>.
  58     <a href="http://www.cliki.net/asdf">ASDF</a> is used for
  59     compilation.  Register the .asd file, e.g. by symlinking it,
  60     then compile cxml-rng using <tt>asdf:operate</tt>.
  61   </p>
  62   <pre>$ ln -sf `pwd`/cxml-rng.asd /path/to/your/registry/
  63 * (asdf:operate 'asdf:load-op :cxml-rng)</pre>
  64
  65   <h3>Implementation-specific notes</h3>
  66   <p>
  67     At this point, cxml-rng is written to work with Lisp strings
  68     (as opposed to runes and rods), and is meant to be used on
  69     Lisp implementations with Unicode support.
  70   </p>
  71
  72   <h3>Example</h3>
  73   <p>
  74     Use <a href="doc/pages/cxml-rng__parse-schema.html">cxml-rng:parse-schema</a>
  75     to parse a Relax NG schema file.  The
  76     resulting <a href="doc/pages/cxml-rng__schema.html">schema</a>
  77     object is a representation of a simplified schema using Lisp
  78     objects, which has gone through most stages of simplification as
  79     described the Relax NG
  80     specification.  <a href="doc/pages/cxml-rng__serialize-schema.html">cxml-rng:serialize-schema</a>
  81     can be used to write a Relax NG file in XML syntax for this
  82     grammar.
  83   </p>
  84   <p>
  85     In order to validate XML against a schema, create a
  86     validation handler for the grammar
  87     using <a href="doc/pages/cxml-rng__make-validator.html">cxml-rng:make-validator</a>.
  88     The validation
  89     handler processes SAX events and can be used with any
  90     function generating such events, in particular
  91     with <a href="http://common-lisp.net/project/cxml/sax.html#parser">cxml:parse-file</a>.
  92   </p>
  93   <pre class="code">(cxml:parse-file "example.xml"
  94                  <span style="color: black">(cxml-rng:make-validator
  95                   (cxml-rng:parse-schema #p"example.rng"))</span>)</pre>
  96   <p>
  97     In order to validate while also processing events with
  98     another handler, use a broadcast handler.  For example, to
  99     parse XML into DOM while also validating it, broadcast to
 100     the validator and DOM builder (in that order):
 101   </p>
 102   <pre class="code" style="color: #777777">(cxml:parse-file "example.xml"
 103                  <span style="color: black">(cxml:make-broadcast-handler</span>
 104                   (cxml-rng:make-validator
 105                    (cxml-rng:parse-schema #p"example.rng"))
 106                   <span style="color: black">(cxml-dom:make-dom-builder))</span>)</pre>
 107   <p>
 108     To validate with the klacks parser, use a tapping source.
 109   </p>
 110   <pre class="code" style="color: #777777">(klacks:with-open-source
 111     (s <span style="color: black">(klacks:make-tapping-source</span>
 112         (cxml:make-source #p"example.xml")
 113         <span style="color: black">(cxml-rng:make-validator
 114          (cxml-rng:parse-schema #p"example.rng"))</span>))
 115   (loop for key = (klacks:peek-next s) while key do (print key)))</pre>
 116
 117   <h3>Documentation</h3>
 118   <p>
 119     <a href="doc/index.html">API documentation</a> is available.
 120   </p>
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