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Re: [xsl] The empty sequence and xs:boolean


Subject: Re: [xsl] The empty sequence and xs:boolean
From: "Tony Graham" <tgraham@xxxxxxxxxx>
Date: Fri, 4 May 2012 11:05:55 +0100 (IST)

On Fri, May 4, 2012 10:23 am, Andrew Welch wrote:
> Given that:
>
> <xsl:variable name="v1" select="/nothing eq 'a' " as="xs:boolean"/>
>
> will cause an exception if /nothing returns (), what is best / most
> efficient way to construct this variable?
>
> <xsl:variable name="v1" select="/nothing = 'a' " as="xs:boolean"/>

That would work, of course (for well-formed XML).

If you want to be obvious about it:

<xsl:variable name="v1" select="exists(/nothing) and /nothing eq 'a'"
as="xs:boolean" />

Regards,


Tony Graham                                   tgraham@xxxxxxxxxx
Consultant                                 http://www.mentea.net
Mentea       13 Kelly's Bay Beach, Skerries, Co. Dublin, Ireland
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