RE: [xsl] Can grouping here the solution ?

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

In all of my professional work with XSLT I have very rarely ever had 
to address text() nodes individually.

At 2011-11-21 18:41 +0100, Robby Pelssers wrote:
> You can do something like
>
> <xsl:for-each group select="display-articles/section/entry" 
> group-by="concat(substring(datum/text(), 1,7), '/', page/text())">
>   <!-- this way you group on unique combinations of e.g. strings 
> like '2005-02/1' -->
> </xsl:for-each>
>
> Robby

In your example above where you have "datum/text()" and 
"page/text()", you are better served by using simply "datum" and "page".

Consider if your user has the following:

    <datum>2003<!--OCR read this '3' as an '8'-->-05-02</datum>

The expression "substring(datum,6,2)" evaluates as "05" as expected.

The expression "substring(datum/text(),6,2)" triggers a runtime error 
because of supplying more than one node for the first argument.

Remember in XPath that the value of an element is the concatenation 
of that element's descendent text nodes.

I tell my students if they ever think they need to address a text 
node directly, to think again because they probably don't.

I hope this is helpful.

. . . . . . . . . . Ken


--
Contact us for world-wide XML consulting and instructor-led training
Free 5-hour video lecture: XSLT/XPath 1.0 & 2.0 http://ude.my/t37DVX
Crane Softwrights Ltd.            http://www.CraneSoftwrights.com/s/
G. Ken Holman                   mailto:gkholman@xxxxxxxxxxxxxxxxxxxx
Google+ profile: https://plus.google.com/116832879756988317389/about
Legal business disclaimers:    http://www.CraneSoftwrights.com/legal