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<h1>22. Virtuoso Functions Guide - current</h1>
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<div id="text">
<h2>current</h2>
<div class="refpurpose">Returns a node-set that has the current node as its only member.</div>
<div class="funcsynopsis">
<span class="funcdef">node-set <span class="function">current</span>
</span>
</div>
<div class="refsect1">
<div class="refsect1title">Description</div>
<p>
The function returns a node-set that has the current node as its only member.
For an outermost expression (an expression not occurring within another expression),
the current node is always the same as the context node. For an expression
occurring within another expression, e.g. within predicate in some path,
the current node is the same as the context node of the first step in the path.
</p>
<p>
Please refer XSL standard before the first use of this function,
to understand exact difference between "current" and "context" node.
</p>
<p>
XSLT 1.0 states that it is an error to use the current() function in a XSL "pattern",
e.g. in "match" attribute of <xsl:key> element, because patterns
have no value assigned for current node assigned processing.
Instead of reporting the error, Virtuoso's XSLT processor uses context node
if current node is not set.
</p>
</div>
<div class="refsect1">
<div class="refsect1title">Return Types</div>
<p>Node-set that has exactly one member.</p>
</div>
<div class="refsect1">
<div class="refsect1title">Examples</div>
<a name="xpf_ex_current" />
<div class="example">
<div class="exampletitle">Function current() in top-level expression.</div>
<p>These two elements produce the same result:</p>
<div>
<pre class="screen">
<xsl:value-of select="current()"/>
<xsl:value-of select="."/>
</pre>
</div>
</div>
<a name="xpf_ex_current" />
<div class="example">
<div class="exampletitle">Function current() inside the path.</div>
<p>
For current node, which is equal to context node of whole <xsl:apply-templates> key,
try to find such item of glossary in the document, that the name of item is equal
to "ref" attribute of current node.
</p>
<div>
<pre class="screen">
<xsl:apply-templates select="//glossary/item[@name=current()/@ref]"/>
</pre>
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