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<h1>22. Virtuoso Functions Guide - XMLType.isSchemaValid</h1>
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<div id="text">
<h2>XMLType.isSchemaValid</h2>
<div class="refpurpose">Validates the given XMLType instance against an arbitrary XML schema, returns 1 if successful, 0 if errors are detected.</div>
<div class="funcsynopsis">
<span class="funcdef">
<span class="function">XMLType.isSchemaValid</span>
</span>
(<span class="paramdefoptional">[in <span class="optional">schema_url</span> varchar]</span>,
<span class="paramdefoptional">[in <span class="optional">top_element_name</span> varchar]</span>);
</div>
<div class="refsect1">
<div class="refsect1title">Description</div>
<p>The function validates the given XMLType instance against the XML
schema located at <span class="computeroutput">schema_url</span>. The name of the
current node of the XML entity should match <span class="computeroutput">top_element_name</span>
if it is specified.</p>
<p>The <span class="computeroutput">schema_url</span> is optional for schema based
instances: the default value is the URI of the associated schema of the
instance. For non-schema based instances the <span class="computeroutput">schema_url</span>
is required, an error is signalled otherwise.</p>
<p>The function does not use or modify internal "validated"
flag that is e.g. used by <span class="computeroutput">XMLType.schemaValidate()</span>.
It is true even if the given <span class="computeroutput">schema_url</span> is equal to the URI
of own schema of the instance.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Parameters</div>
<div class="refsect2">
<span class="refsect2title">schema_url – </span>
The URI of the schema to apply.
</div>
<div class="refsect2">
<span class="refsect2title">top_element_name – </span>
The allowed name of top level element of the instance.
</div>
</div>
<div class="refsect1">
<div class="refsect1title">Return Types</div>
<p>The function returns 1 if the validation is passed, 0 if it is failed.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Examples</div>
<a name="ex_XMLType.isSchemaValid" />
<div class="example">
<div class="exampletitle">Failed schema validation</div>
<p>The example creates an XMLType instance that is a document with a single element node"bad"
and tries to validate it against XMLschema "file://xmlschema/test0001/clean.xsd" that does not match actual content of the document.
The call of <span class="computeroutput">isSchemaValid()</span> returns zero indicating failed validation.
</p>
<div>
<pre class="screen">
select XMLType('<bad />', 'file://xmlschema/test0001/clean.xsd').isSchemaValid()
callret
INTEGER
_______________________________________________________________________________
0
1 Rows. -- 00000 msec.
</pre>
</div>
</div>
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<div class="refsect1">
<div class="refsect1title">See Also</div>
<p>
<a href="fn_XMLType.isSchemaValidated.html">XMLType.isSchemaValidated()</a>
</p>
<p>
<a href="fn_XMLType.setSchemaValidated.html">XMLType.setSchemaValidated()</a>
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<a href="fn_XMLType.schemaValidate.html">XMLType.schemaValidate()</a>
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