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        <a href="lxml-module.html">Package&nbsp;lxml</a> ::
        <a href="lxml.isoschematron-module.html">Package&nbsp;isoschematron</a> ::
        Class&nbsp;Schematron
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<!-- ==================== CLASS DESCRIPTION ==================== -->
<h1 class="epydoc">Class Schematron</h1><p class="nomargin-top"><span class="codelink"><a href="lxml.isoschematron-pysrc.html#Schematron">source&nbsp;code</a></span></p>
<pre class="base-tree">
      object --+    
               |    
<a href="lxml.etree._Validator-class.html" onclick="show_private();">etree._Validator</a> --+
                   |
                  <strong class="uidshort">Schematron</strong>
</pre>

<hr />
<p>An ISO Schematron validator.</p>
<p>Pass a root Element or an ElementTree to turn it into a validator.
Alternatively, pass a filename as keyword argument 'file' to parse from
the file system.</p>
<p>Schematron is a less well known, but very powerful schema language.
The main idea is to use the capabilities of XPath to put restrictions on
the structure and the content of XML documents.</p>
<p>The standard behaviour is to fail on <tt class="rst-docutils literal"><span class="pre">failed-assert</span></tt> findings only
(<tt class="rst-docutils literal">ASSERTS_ONLY</tt>).  To change this, you can either pass a report filter
function to the <tt class="rst-docutils literal">error_finder</tt> parameter (e.g. <tt class="rst-docutils literal">ASSERTS_AND_REPORTS</tt>
or a custom <tt class="rst-docutils literal">XPath</tt> object), or subclass isoschematron.Schematron for
complete control of the validation process.</p>
<p>Built on the Schematron language 'reference' skeleton pure-xslt
implementation, the validator is created as an XSLT 1.0 stylesheet using
these steps:</p>
<blockquote>
<ol class="rst-arabic simple" start="0">
<li>(Extract from XML Schema or RelaxNG schema)</li>
<li>Process inclusions</li>
<li>Process abstract patterns</li>
<li>Compile the schematron schema to XSLT</li>
</ol>
</blockquote>
<p>The <tt class="rst-docutils literal">include</tt> and <tt class="rst-docutils literal">expand</tt> keyword arguments can be used to switch off
steps 1) and 2).
To set parameters for steps 1), 2) and 3) hand parameter dictionaries to the
keyword arguments <tt class="rst-docutils literal">include_params</tt>, <tt class="rst-docutils literal">expand_params</tt> or
<tt class="rst-docutils literal">compile_params</tt>.
For convenience, the compile-step parameter <tt class="rst-docutils literal">phase</tt> is also exposed as a
keyword argument <tt class="rst-docutils literal">phase</tt>. This takes precedence if the parameter is also
given in the parameter dictionary.</p>
<p>If <tt class="rst-docutils literal">store_schematron</tt> is set to True, the (included-and-expanded)
schematron document tree is stored and available through the <tt class="rst-docutils literal">schematron</tt>
property.
If <tt class="rst-docutils literal">store_xslt</tt> is set to True, the validation XSLT document tree will be
stored and can be retrieved through the <tt class="rst-docutils literal">validator_xslt</tt> property.
With <tt class="rst-docutils literal">store_report</tt> set to True (default: False), the resulting validation
report document gets stored and can be accessed as the <tt class="rst-docutils literal">validation_report</tt>
property.</p>
<p>Here is a usage example:</p>
<pre class="rst-literal-block">
&gt;&gt;&gt; from lxml import etree
&gt;&gt;&gt; from lxml.isoschematron import Schematron

&gt;&gt;&gt; schematron = Schematron(etree.XML('''
... &lt;schema xmlns=&quot;http://purl.oclc.org/dsdl/schematron&quot; &gt;
...   &lt;pattern id=&quot;id_only_attribute&quot;&gt;
...     &lt;title&gt;id is the only permitted attribute name&lt;/title&gt;
...     &lt;rule context=&quot;*&quot;&gt;
...       &lt;report test=&quot;&#64;*[not(name()='id')]&quot;&gt;Attribute
...         &lt;name path=&quot;&#64;*[not(name()='id')]&quot;/&gt; is forbidden&lt;name/&gt;
...       &lt;/report&gt;
...     &lt;/rule&gt;
...   &lt;/pattern&gt;
... &lt;/schema&gt;'''),
... error_finder=Schematron.ASSERTS_AND_REPORTS)

&gt;&gt;&gt; xml = etree.XML('''
... &lt;AAA name=&quot;aaa&quot;&gt;
...   &lt;BBB id=&quot;bbb&quot;/&gt;
...   &lt;CCC color=&quot;ccc&quot;/&gt;
... &lt;/AAA&gt;
... ''')

&gt;&gt;&gt; schematron.validate(xml)
False

&gt;&gt;&gt; xml = etree.XML('''
... &lt;AAA id=&quot;aaa&quot;&gt;
...   &lt;BBB id=&quot;bbb&quot;/&gt;
...   &lt;CCC/&gt;
... &lt;/AAA&gt;
... ''')

&gt;&gt;&gt; schematron.validate(xml)
True
</pre>

<!-- ==================== INSTANCE METHODS ==================== -->
<a name="section-InstanceMethods"></a>
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      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a name="_extract"></a><span class="summary-sig-name">_extract</span>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">element</span>)</span><br />
      Extract embedded schematron schema from non-schematron host schema.
This method will only be called by __init__ if the given schema document
is not a schematron schema by itself.
Must return a schematron schema document tree or None.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="lxml.isoschematron-pysrc.html#Schematron._extract">source&nbsp;code</a></span>
            
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      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="lxml.isoschematron.Schematron-class.html#__init__" class="summary-sig-name">__init__</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">etree</span>=<span class="summary-sig-default">None</span>,
        <span class="summary-sig-arg">file</span>=<span class="summary-sig-default">None</span>,
        <span class="summary-sig-arg">include</span>=<span class="summary-sig-default">True</span>,
        <span class="summary-sig-arg">expand</span>=<span class="summary-sig-default">True</span>,
        <span class="summary-sig-arg">include_params</span>=<span class="summary-sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="summary-sig-arg">expand_params</span>=<span class="summary-sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="summary-sig-arg">compile_params</span>=<span class="summary-sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="summary-sig-arg">store_schematron</span>=<span class="summary-sig-default">False</span>,
        <span class="summary-sig-arg">store_xslt</span>=<span class="summary-sig-default">False</span>,
        <span class="summary-sig-arg">store_report</span>=<span class="summary-sig-default">False</span>,
        <span class="summary-sig-arg">phase</span>=<span class="summary-sig-default">None</span>,
        <span class="summary-sig-arg">error_finder</span>=<span class="summary-sig-default">//svrl:failed-assert</span>)</span><br />
      x.__init__(...) initializes x; see help(type(x)) for signature</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="lxml.isoschematron-pysrc.html#Schematron.__init__">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
      <table width="100%" cellpadding="0" cellspacing="0" border="0">
        <tr>
          <td><span class="summary-sig"><a href="lxml.isoschematron.Schematron-class.html#__call__" class="summary-sig-name">__call__</a>(<span class="summary-sig-arg">self</span>,
        <span class="summary-sig-arg">etree</span>)</span><br />
      Validate doc using Schematron.</td>
          <td align="right" valign="top">
            <span class="codelink"><a href="lxml.isoschematron-pysrc.html#Schematron.__call__">source&nbsp;code</a></span>
            
          </td>
        </tr>
      </table>
      
    </td>
  </tr>
  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="lxml.etree._Validator-class.html" onclick="show_private();">etree._Validator</a></code></b>:
      <code><a href="lxml.etree._Validator-class.html#__new__">__new__</a></code>,
      <code><a href="lxml.etree._Validator-class.html#assertValid">assertValid</a></code>,
      <code><a href="lxml.etree._Validator-class.html#assert_">assert_</a></code>,
      <code><a href="lxml.etree._Validator-class.html#validate">validate</a></code>
      </p>
    <div class="private">    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="lxml.etree._Validator-class.html" onclick="show_private();">etree._Validator</a></code></b> (private):
      <code><a href="lxml.etree._Validator-class.html#_append_log_message" onclick="show_private();">_append_log_message</a></code>,
      <code><a href="lxml.etree._Validator-class.html#_clear_error_log" onclick="show_private();">_clear_error_log</a></code>
      </p></div>
    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
      <code>__delattr__</code>,
      <code>__format__</code>,
      <code>__getattribute__</code>,
      <code>__hash__</code>,
      <code>__reduce__</code>,
      <code>__reduce_ex__</code>,
      <code>__repr__</code>,
      <code>__setattr__</code>,
      <code>__sizeof__</code>,
      <code>__str__</code>,
      <code>__subclasshook__</code>
      </p>
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<!-- ==================== CLASS VARIABLES ==================== -->
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      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_domain"></a><span class="summary-name">_domain</span> = <code title="28">28</code>
    </td>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
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        <a name="_level"></a><span class="summary-name">_level</span> = <code title="2">2</code>
    </td>
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      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_error_type"></a><span class="summary-name">_error_type</span> = <code title="4000">4000</code>
    </td>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="ASSERTS_ONLY"></a><span class="summary-name">ASSERTS_ONLY</span> = <code title="//svrl:failed-assert">//svrl:failed-assert</code>
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="lxml.isoschematron.Schematron-class.html#ASSERTS_AND_REPORTS" class="summary-name">ASSERTS_AND_REPORTS</a> = <code title="//svrl:failed-assert | //svrl:successful-report">//svrl:failed-assert | //svrl:successful<code class="variable-ellipsis">...</code></code>
    </td>
  </tr>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_extract_xsd"></a><span class="summary-name">_extract_xsd</span> = <code title="&lt;lxml.etree.XSLT object&gt;">&lt;lxml.etree.XSLT object&gt;</code>
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_extract_rng"></a><span class="summary-name">_extract_rng</span> = <code title="&lt;lxml.etree.XSLT object&gt;">&lt;lxml.etree.XSLT object&gt;</code>
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_include"></a><span class="summary-name">_include</span> = <code title="&lt;lxml.etree.XSLT object&gt;">&lt;lxml.etree.XSLT object&gt;</code>
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_expand"></a><span class="summary-name">_expand</span> = <code title="&lt;lxml.etree.XSLT object&gt;">&lt;lxml.etree.XSLT object&gt;</code>
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_compile"></a><span class="summary-name">_compile</span> = <code title="&lt;lxml.etree.XSLT object&gt;">&lt;lxml.etree.XSLT object&gt;</code>
    </td>
  </tr>
<tr class="private">
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a name="_validation_errors"></a><span class="summary-name">_validation_errors</span> = <code title="//svrl:failed-assert">//svrl:failed-assert</code>
    </td>
  </tr>
</table>
<!-- ==================== PROPERTIES ==================== -->
<a name="section-Properties"></a>
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         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
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  </td>
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    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="lxml.isoschematron.Schematron-class.html#schematron" class="summary-name">schematron</a><br />
      ISO-schematron schema document (None if object has been initialized
with store_schematron=False).
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="lxml.isoschematron.Schematron-class.html#validator_xslt" class="summary-name">validator_xslt</a><br />
      ISO-schematron skeleton implementation XSLT validator document (None
if object has been initialized with store_xslt=False).
    </td>
  </tr>
<tr>
    <td width="15%" align="right" valign="top" class="summary">
      <span class="summary-type">&nbsp;</span>
    </td><td class="summary">
        <a href="lxml.isoschematron.Schematron-class.html#validation_report" class="summary-name">validation_report</a><br />
      ISO-schematron validation result report (None if result-storing has
been turned off).
    </td>
  </tr>
  <tr>
    <td colspan="2" class="summary">
    <p class="indent-wrapped-lines"><b>Inherited from <code><a href="lxml.etree._Validator-class.html" onclick="show_private();">etree._Validator</a></code></b>:
      <code><a href="lxml.etree._Validator-class.html#error_log">error_log</a></code>
      </p>
    <p class="indent-wrapped-lines"><b>Inherited from <code>object</code></b>:
      <code>__class__</code>
      </p>
    </td>
  </tr>
</table>
<!-- ==================== METHOD DETAILS ==================== -->
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        <td align="left"><span class="table-header">Method Details</span></td>
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         ><span class="options">[<a href="#section-MethodDetails"
         class="privatelink" onclick="toggle_private();"
         >hide private</a>]</span></td>
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<a name="__init__"></a>
<div>
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       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">__init__</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">etree</span>=<span class="sig-default">None</span>,
        <span class="sig-arg">file</span>=<span class="sig-default">None</span>,
        <span class="sig-arg">include</span>=<span class="sig-default">True</span>,
        <span class="sig-arg">expand</span>=<span class="sig-default">True</span>,
        <span class="sig-arg">include_params</span>=<span class="sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="sig-arg">expand_params</span>=<span class="sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="sig-arg">compile_params</span>=<span class="sig-default"><code class="variable-group">{</code><code class="variable-group">}</code></span>,
        <span class="sig-arg">store_schematron</span>=<span class="sig-default">False</span>,
        <span class="sig-arg">store_xslt</span>=<span class="sig-default">False</span>,
        <span class="sig-arg">store_report</span>=<span class="sig-default">False</span>,
        <span class="sig-arg">phase</span>=<span class="sig-default">None</span>,
        <span class="sig-arg">error_finder</span>=<span class="sig-default">//svrl:failed-assert</span>)</span>
    <br /><em class="fname">(Constructor)</em>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="lxml.isoschematron-pysrc.html#Schematron.__init__">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  x.__init__(...) initializes x; see help(type(x)) for signature
  <dl class="fields">
    <dt>Overrides:
        object.__init__
        <dd><em class="note">(inherited documentation)</em></dd>
    </dt>
  </dl>
</td></tr></table>
</div>
<a name="__call__"></a>
<div>
<table class="details" border="1" cellpadding="3"
       cellspacing="0" width="100%" bgcolor="white">
<tr><td>
  <table width="100%" cellpadding="0" cellspacing="0" border="0">
  <tr valign="top"><td>
  <h3 class="epydoc"><span class="sig"><span class="sig-name">__call__</span>(<span class="sig-arg">self</span>,
        <span class="sig-arg">etree</span>)</span>
    <br /><em class="fname">(Call operator)</em>
  </h3>
  </td><td align="right" valign="top"
    ><span class="codelink"><a href="lxml.isoschematron-pysrc.html#Schematron.__call__">source&nbsp;code</a></span>&nbsp;
    </td>
  </tr></table>
  
  <p>Validate doc using Schematron.</p>
<p>Returns true if document is valid, false if not.</p>
  <dl class="fields">
  </dl>
</td></tr></table>
</div>
<br />
<!-- ==================== CLASS VARIABLE DETAILS ==================== -->
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  <h3 class="epydoc">ASSERTS_AND_REPORTS</h3>
  
  <dl class="fields">
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    <dt>Value:</dt>
      <dd><table><tr><td><pre class="variable">
//svrl:failed-assert | //svrl:successful-report
</pre></td></tr></table>
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  <h3 class="epydoc">schematron</h3>
  ISO-schematron schema document (None if object has been initialized
with store_schematron=False).
  <dl class="fields">
    <dt>Get Method:</dt>
    <dd class="value"><span class="summary-sig"><i>unreachable</i>.schematron(<span class="summary-sig-arg">self</span>)</span>
        - ISO-schematron schema document (None if object has been initialized
with store_schematron=False).
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  <h3 class="epydoc">validator_xslt</h3>
  ISO-schematron skeleton implementation XSLT validator document (None
if object has been initialized with store_xslt=False).
  <dl class="fields">
    <dt>Get Method:</dt>
    <dd class="value"><span class="summary-sig"><i>unreachable</i>.validator_xslt(<span class="summary-sig-arg">self</span>)</span>
        - ISO-schematron skeleton implementation XSLT validator document (None
if object has been initialized with store_xslt=False).
    </dd>
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  <h3 class="epydoc">validation_report</h3>
  ISO-schematron validation result report (None if result-storing has
been turned off).
  <dl class="fields">
    <dt>Get Method:</dt>
    <dd class="value"><span class="summary-sig"><i>unreachable</i>.validation_report(<span class="summary-sig-arg">self</span>)</span>
        - ISO-schematron validation result report (None if result-storing has
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