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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, DTD Compatibility, and
  25     the XSD type 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 <!--
  44   <p>
  45     Download cxml-rng
  46     <a href="http://www.lichteblau.com/cxml-rng/download/">tarballs</a>
  47     or get it from git: <tt>http://www.lichteblau.com/git/cxml-rng.git</tt>
  48   </p>
  49 -->
  50   <p>
  51     Download a cxml-rng
  52     <a href="http://www.lichteblau.com/cxml-rng/download/">tarball</a>.
  53   </p>
  54   <p>
  55     cxml-rng needs
  56     <a href="http://common-lisp.net/project/cxml">Closure XML</a>,
  57     <a href="http://weitz.de/cl-ppcre/">CL-PPCE</a>,
  58     <a href="http://www.pps.jussieu.fr/~jch/software/cl-yacc/">CL-Yacc</a>,
  59     <a href="http://www.cliki.net/PARSE-NUMBER">parse-number</a>,
  60     and <a href="http://www.cliki.net/cl-base64">cl-base64</a>.
  61     <a href="http://www.cliki.net/asdf">ASDF</a> is used for
  62     compilation.  Register the .asd file, e.g. by symlinking it,
  63     then compile cxml-rng using <tt>asdf:operate</tt>.
  64   </p>
  65   <pre>$ ln -sf `pwd`/cxml-rng.asd /path/to/your/registry/
  66 * (asdf:operate 'asdf:load-op :cxml-rng)</pre>
  67
  68   <h3>Implementation-specific notes</h3>
  69   <p>
  70     At this point, cxml-rng is written to work with Lisp strings
  71     (as opposed to runes and rods), and is meant to be used on
  72     Lisp implementations with Unicode support.
  73   </p>
  74
  75   <h3>Example</h3>
  76   <p>
  77     Use <a href="doc/pages/cxml-rng__parse-schema.html">cxml-rng:parse-schema</a>
  78     to parse a Relax NG schema file.  The
  79     resulting <a href="doc/pages/cxml-rng__schema.html">schema</a>
  80     object is a representation of a simplified schema using Lisp
  81     objects, which has gone through most stages of simplification as
  82     described the Relax NG
  83     specification.  <a href="doc/pages/cxml-rng__serialize-schema.html">cxml-rng:serialize-schema</a>
  84     can be used to write a Relax NG file in XML syntax for this
  85     grammar.
  86   </p>
  87   <p>
  88     In order to validate XML against a schema, create a
  89     validation handler for the grammar
  90     using <a href="doc/pages/cxml-rng__make-validator.html">cxml-rng:make-validator</a>.
  91     The validation
  92     handler processes SAX events and can be used with any
  93     function generating such events, in particular
  94     with <a href="http://common-lisp.net/project/cxml/sax.html#parser">cxml:parse-file</a>.
  95   </p>
  96   <pre class="code">(cxml:parse-file "example.xml"
  97                  <span style="color: black">(cxml-rng:make-validator
  98                   (cxml-rng:parse-schema #p"example.rng"))</span>)</pre>
  99   <p>
 100     The validator accepts another SAX handler as an optional
 101     second argument.  For example, to parse XML into DOM while also
 102     validating it, use the validator like this:
 103   </p>
 104   <pre class="code" style="color: #777777">(cxml:parse-file "example.xml"
 105                  <span style="color: black">(cxml-rng:make-validator</span>
 106                   (cxml-rng:parse-schema #p"example.rng")
 107                   <span style="color: black">(cxml-dom:make-dom-builder))</span>)</pre>
 108   <p>
 109     When using the klacks parser, create a validating source.
 110   </p>
 111   <pre class="code" style="color: #777777">(klacks:with-open-source
 112     (s <span style="color: black">(cxml-rng:make-validating-source
 113         #p"example.xml"
 114         (cxml-rng:parse-schema #p"example.rng"))</span>)
 115   (loop for key = (klacks:peek-next s) while key do (print key)))</pre>
 116   <p>
 117     DTD Compatibility processing (basically, checking of IDs and
 118     addition of default values) is done using a
 119     <a href="doc/pages/cxml-rng__make-dtd-compatibility-handler.html">DTD Compatibility handler</a>.
 120     You can use this handler together with a validator or by its own.
 121   </p>
 122   <pre class="code" style="color: #777777">(cxml:parse-file "example.xml"
 123                  <span style="color: black">(cxml-rng:make-dtd-compatibility-handler</span>
 124                   (cxml-rng:parse-schema #p"example.rng")
 125                   <span style="color: black">(cxml-dom:make-dom-builder))</span>)</pre>
 126
 127   <h3>Documentation</h3>
 128   <p>
 129     <a href="doc/index.html">API documentation</a> is available.
 130   </p>
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