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RE: Determining if the first child is a para element
- To: xsl-list at mulberrytech dot com
- Subject: RE: Determining if the first child is a para element
- From: kenb at medifor dot com
- Date: Thu, 9 Nov 2000 14:11:26 -0800
- Reply-To: xsl-list at mulberrytech dot com
Wendell,
The whitespace only issue hadn't occurred to me. Since the
XML input comes from a third party, I think I'll have to use your
more complex test. Thanks.
Ken
-----Original Message-----
From: Wendell Piez [mailto:wapiez@mulberrytech.com]
Sent: Thursday, November 09, 2000 6:42 AM
To: xsl-list@mulberrytech.com
Subject: Re: Determining if the first child is a para element
Ken,
At 10:15 AM 11/9/00 +0000, Jeni wrote:
>So, to test whether the first child node of
>the current node is an element, use:
>
> <xsl:if test="child::node()[1][self::*]">
> ...
> </xsl:if>
Also be careful in this case that you have accounted for the possibility of
any whitespace-only text nodes. So, for example, if your document read:
<CHAPTER>
<para>Here's my first child element, a para.</para>
...
</CHAPTER>
Jeni's test above will fail on account of the whitespace-only text node
preceding the para element (it contains a carriage return and two space
characters).
Adjust for this by saying
<xsl:strip-space elements="CHAPTER"/>
at the top level, or altering your test (somewhat horribly) to:
<xsl:if test="child::node()[not(.=normalize-space(.))][1][self::para]">
...
</xsl:if>
Jeni's test for whether the first element child is a para is still good, of
course, since the whitespace-only nodes won't come into play then.
Regards,
Wendell
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Wendell Piez mailto:wapiez@mulberrytech.com
Mulberry Technologies, Inc. http://www.mulberrytech.com
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