Subject: Re: [xsl] XSLT 2.0 empty string: Summary? From: David Carlisle <davidc@xxxxxxxxx> Date: Wed, 2 Mar 2005 10:15:38 GMT |
If I can get past the DC math filter without reprimand, sorry not today... I think his point that the {} empty set is a member of any set was the Ah-ha moment for me. That's what allows the as="xs:string?" to succeed rather than report the error. The empty set isn't a _member_ of every set. {} isn't a member of {1,2,3} for example. It is a member of {{}} though (the set with one member, the empty set) It is a _subset_ of every set. David ________________________________________________________________________ This e-mail has been scanned for all viruses by Star. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________
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