RE: [xsl] Generic template for collapsing arbitrary length runs o f same tag into one tag?

[Wendell Piez <wapiez at mulberrytech dot com>]

Dave,

Nice solution! (you beat me to it)

I'd suggest two tiny tweaks, which you might judge to be merely aesthetic 
although the second does improve performance a bit:

At 02:26 PM 8/15/2002, you wrote:
> <xsl:template match="i">
>         <xsl:if test="not(name(preceding-sibling::node()[1])='i')">
I'd express this as test="not(preceding-sibling::node()[1][self::i])" as a 
slightly more direct use of XPath.

>                 <i>
>                         <xsl:apply-templates/>
>                         <xsl:if test="name(following::node()[1])='i'">
>                                 <xsl:apply-templates
> select="following::node()[1]" mode="following"/>
>                         </xsl:if>
Instead of an apply-templates wrapped in an xsl:if, I'd simply say

<xsl:apply-templates select="following-sibling::node()[1][self::i]" 
mode="following"/>

You don't need the test if you can express the selection in such a way that 
if the correct node is not there, nothing will come back.

>                 </i>
>         </xsl:if>
> </xsl:template>
>
> <xsl:template match="i" mode="following">
>         <xsl:apply-templates/>
>         <xsl:if test="name(following::node()[1])='i'">
>                 <xsl:apply-templates select="following::node()[1]"
> mode="following"/>
>         </xsl:if>
Likewise here.

> </xsl:template>
>
> Seems to work in Saxon 6.5.2.
Well done! I don't think we've seen exactly this problem before.

But Richard, you should be aware that any intervening white space between 
your <i> elements will not be folded in, but will break the sequence.

Cheers,
Wendell


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Wendell Piez                            mailto:wapiez@mulberrytech.com
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