Re: [xsl] Re: Assignment no, dynamic scoping si (was: Re: RE: Wishes for XSL revisions ...

[Gunther Schadow <gunther@xxxxxxxxxxxxxxxxxxxxxx>]

Hi Wendell,

> Is there a reason I missed why
>
> <xsl:template match='paragraph'>
>   <p class='ancestor-or-self::*[@source][last()]/@source'>
>     <xsl:apply-templates/>
>   </p>
> </xsl:template>
>
> wouldn't work for your example?

no you didn't miss a reason in my *example*, but my example
may have been distracting for the use case :-) In this case it
would work because the value is *provided* so you can grab it from
the source document via XPath.

However, what if the value is not provided in the document, but
is *computed* as templates are being processed? For example, the
text-indent of an XML to ASCII pretty printer.

In that case your only option with this approach would be to redo
the computation process from the structure of the document wherever
you need that value. I would not worry so much how inefficient that
may be at runtime; what I do care is that it requires to manage that
computation separately from the normal flow of template processing.

regards
-Gunther


--
Gunther Schadow, M.D., Ph.D.                    gschadow@xxxxxxxxxxxxxxx
Medical Information Scientist      Regenstrief Institute for Health Care
Adjunct Assistant Professor        Indiana University School of Medicine
tel:1(317)630-7960                         http://aurora.regenstrief.org



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