[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: () equivalent to () ?

Subject: Re: () equivalent to () ?
From: David Carlisle <davidc@xxxxxxxxx>
Date: Mon, 22 Aug 2005 14:06:51 +0100
Re:  () equivalent to () ?
> Is the empty sequence equal to itself?

XPath2 has several notions of equality (=, eq, is, deep-equal)

(
concat("[",()=(),"]"),
concat("[",() eq (),"]"),
concat("[",() is (),"]"),
concat("[",deep-equal((),()),"]")
)

evaluates to 
[false] [] [] [true]

so the answer depends on what you mean by equality.

Note that
(
concat("[",()!=(),"]"),
concat("[",() ne (),"]")
)
evaluates to
[false] []

so () = () is false and () != () is also false. (This is teh same as in
xslt1 and is an automatic consequnce of teh implied existential
quantification in the definition of = and !=.

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
________________________________________________________________________

Current Thread

PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.