Tunnel="yes" allows params to be passed transparently from one template
to another, regardless of the number of template matches in between.
Set tunnel="yes" on the with-param when calling or applying templates,
set tunnel="yes" in the receiving stylesheet.
<a>1</a>
<b>
<c>something</c>
</b>
<xsl:template match="a">
<xsl:variable name="c" select="a+1"/>
<xsl:apply-templates>
<xsl:with-param name="count" select="$c" tunnel="yes"/>
</xsl:apply-templates>
</xsl:template>
<xsl:template match="b">
... Something ...
<xsl:apply-templates/>
</xsl:template>
<xsl:template match="c">
<xsl:param name="count" tunnel="yes"/>
<xsl:value-of select="$count"/>
</xsl:template>
Thanks!
Angela
-----Original Message-----
From: Justin Johansson [mailto:procode(_at_)tpg(_dot_)com(_dot_)au]
Sent: Friday, July 27, 2007 10:24 AM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] Tunnelled params and variables
What are the use cases for having tunnel="yes" on xsl:params and
variables?
It must be in the spec for some good reason, though I hestisate using
the feature fearing that the use thereof may lead to a poor programming
practice.
I well remember the list's attitude to local functions had these been
allowed in XSLT.
Thanks for the insight,
Justin Johansson
*** A horse with no name is called Lambda ***
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