Re: How to get the preceding-sibling of parameter cont

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Subject: Re: How to get the preceding-sibling of parameter context node[URGENT]
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Thu, 14 Feb 2002 11:13:25 -0500

Hi Deep,

At 01:56 AM 2/14/02, you wrote:

<xsl:template name="mytemplate">
<xsl:param name="contextnode"/>
<xsl:for-each select="$contextnode">
//How to get the preceding-sibling of context node
here following does not work

<xsl:variable name="cnt"
select="count(preceding-sibling::$contextnode[@name='data'])"/>

This doesn't work because '$contextnode', a variable reference, is not a valid node test. (A node test is the part of a location step, in an XPath, that comes after the '::', which is part of the axis identifier.) But you have the correct axis.

count(preceding-sibling::*[@name='data']) will count those sibling elements preceding the context node that have a @name attribute = 'data'. The node test here is '*' (tests true for any node of the primary node type of the axis, here elements).

count(preceding-sibling::mything[@name='data']) will count those 'mything' sibling elements preceding the context node that have a @name attribute = 'data'. The node test here is 'mything' (tests true for any node named 'mything' on the axis).

count(preceding-sibling::*[name()=name($contextnode)][@name='data']) will count those sibling elements preceding the context node whose name is the same as that of $contextnode, and that have a @name attribute = 'data'. The node test here is again '*', but you are then filtering the elements by testing their names against the name of $contextnode.

I don't know if you actually need the [@name='data'] test, which checks the value of a @name attribute. If that's what you want to do, great.

I hope that helps. You might find a good breakdown of how XPath works, like that in Mike Kay's book, to be illuminating.

Cheers,
Wendell


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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
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Current Thread
How to get the preceding-sibling of parameter context node[URGENT] Mailer Mailer - Thu, 14 Feb 2002 01:53:08 -0500 (EST) Jeni Tennison - Thu, 14 Feb 2002 03:15:56 -0500 (EST) Gennady Loskutov - Thu, 14 Feb 2002 03:20:22 -0500 (EST) Wendell Piez - Thu, 14 Feb 2002 11:10:42 -0500 (EST) <= <Possible follow-ups> Joerg Pietschmann - Thu, 14 Feb 2002 03:42:49 -0500 (EST)

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