In XSLT 1.0 the problem is nastier and expensive, although doable. But when
restricted to 1.0, one should keep in mind other options (such as judicious
pre-processing) to alleviate problems either with performance or code
complexity.
It's doable because the pb can in fact be found on preceding:: (even when
not on preceding-sibling::).
As the OP stated in his opening message,
"As far as I understand it, the main problem is that the expression I
have to construct for matching can't rely simply on the preceding:: or
ancestor:: axes since the <pb/> can really appear anywhere in the
tree."
The following XSLT 1.0 transformation has a template that correctly
matches (only) the required text nodes:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
<xsl:strip-space elements="*"/>
<xsl:template match="text()"/>
<xsl:template match=
"text()
[count(preceding::text()[1]/preceding::node()
| preceding::text()[1]/ancestor::node()
)
<
count((preceding::pb[1] | ancestor::pb[1])[last()]/preceding::node()
|
(preceding::pb[1] | ancestor::pb[1])[last()]/ancestor::node()
)
]
"
>
***Matching*** '<xsl:value-of select="."/>'
</xsl:template>
</xsl:stylesheet>
When applied on this xml document:
<t>
<item>
before before
<pb n="3"/>
before a vowel.
<pb n="26">
<list>
<item n="a">The
<mentioned>thingy</mentioned>
</item>
</list>
</pb>
</item>
</t>
it correctly produces:
***Matching*** '
before a vowel.
'
***Matching*** 'The
'
--
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
On Fri, Jan 9, 2009 at 9:28 AM, Wendell Piez
<wapiez(_at_)mulberrytech(_dot_)com> wrote:
Hi,
At 12:18 PM 1/9/2009, Martin wrote:
Martin Honnen wrote:
David B?rgin wrote:
In one template of my XSL stylesheet I'd like to match a text node with
certain properties. Namely, the template should match for any text node
where the nearest preceding non-empty text node is farther away than (=
comes before) the nearest preceding <pb/> (page-break milestone element).
<xsl:template
match="text()[preceding::text()[1] >> preceding::pb[1]]">
I think you want << instead of >>:
<xsl:template
match="text()[preceding::text()[1] << preceding::pb[1]]">
This will work in XSLT 2.0, although it sounds like you also want
text()[preceding::text()[normalize-space()][1] << preceding::pb[1]]
... which makes sure that whitespace-only text nodes won't be considered in
the test.
In XSLT 1.0 the problem is nastier and expensive, although doable. But when
restricted to 1.0, one should keep in mind other options (such as judicious
pre-processing) to alleviate problems either with performance or code
complexity.
It's doable because the pb can in fact be found on preceding:: (even when
not on preceding-sibling::).
Cheers,
Wendell
======================================================================
Wendell Piez
mailto:wapiez(_at_)mulberrytech(_dot_)com
Mulberry Technologies, Inc. http://www.mulberrytech.com
17 West Jefferson Street Direct Phone: 301/315-9635
Suite 207 Phone: 301/315-9631
Rockville, MD 20850 Fax: 301/315-8285
----------------------------------------------------------------------
Mulberry Technologies: A Consultancy Specializing in SGML and XML
======================================================================
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