Subject: Re: [xsl] Correct way to test for no match From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx> Date: Mon, 05 Oct 2009 19:10:22 -0400 |
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.
Cheers, Wendell
====================================================================== Wendell Piez mailto:wapiez@xxxxxxxxxxxxxxxx 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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