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