Re: [xsl] Correct way to test for no match

[Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>]

Dan,

At 06:33 PM 10/5/2009, you wrote:
> > This might sometimes be useful, if for example you are only 
> > interested in (1) if (2) is true. That is,
> >
> > unparsed-entity-uri(ancestor::ipb/figure/subfig/graphic[@boardno=$sht_num]/@boardno)
> >
> > will return a URI if (and only if) $sht_num appears as a @boardno 
> > on an ancestor::ipb/figure/subfig/graphic, and is also declared as 
> > an unparsed entity (with a URI not ''); otherwise it will be ''.
>
> So why did my when clause testing against the '' (empty string) not 
> fire? That was my first impulse.

Sorry, I couldn't really say without looking at the problem fresh, in 
reduced form, and maybe not even then.

Keep in mind that the test "/path/to/node/that/is/not/there = ''" is false.

But it sounds to me like you have a handle on it now.

Cheers,
Wendell



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Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
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