RE: [xsl] Conditional expressions using optional attributes/elements

[William Bagby <williamb at adone dot com>]

Aleksei,

Thanks.  It works fine now.


William.

-----Original Message-----
From: Aleksei Valikov [mailto:valikov@fzi.de]
Sent: Monday, August 13, 2001 9:48 AM
To: xsl-list@lists.mulberrytech.com
Subject: Re: [xsl] Conditional expressions using optional
attributes/elements


Hi.

> Problem 1:

> <xsl:if test="@enabled != 'false' and @override != 'false'">
> <!-- do something -->
> </xsl:if>
> But if the attributes are not defined, it doesn't act as expected.

Try not(@enabled='false') and not(@override='false')
See the definitions of equality expressions with node-sets. You'll
understand why a != b is not the same as
not(a=b)

> I have an element which has optional *elements*, and I want 
to test the
> values of attributes of these elements.  Here's the DTD:

> <xsl:if test="enabled/@value != 'false' and override/@value 
!= 'false'">
> <!-- do something -->
> </xsl:if>

> But if the *elements* are not defined, it doesn't act as expected.

The same - use not(enabled/@value = 'false').

Bye.
/lexi



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