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 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- XML, XSL-FO and XSLT consulting, training and programming
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