RE: [xsl] possible value-of return values

Subject: RE: [xsl] possible value-of return values
From: "Michael Kay" <mhkay@xxxxxxxxxxxx>
Date: Mon, 30 Jul 2001 23:41:59 +0100
> Given the following XML document:
> <root>
> <user name="Alex" password="Elephant" color=""/>
> <user name="Reuter" password="Rhino"/>
> </root>
> I was wondering if anyone knew the distinction in return 
> values between:
> <xsl:value-of select="/root/user[@name='Alex']/@color"/>
> And
> <xsl:value-of select="/root/user[@name='Reuter']/@color"/>
They are both empty strings.
> My guess is they would both be null, but I need to execute logic which
> hinges on whether the attribute exists and has a null value 
> OR whether it exists at all.
You can test whether the attribute exists:

xsl:if test="/root/user[@name='Alex']/@color"

Mike Kay
Software AG 

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