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

Re: Testing 2 XML documents for equality - a solution

Subject: Re: Testing 2 XML documents for equality - a solution
From: Wendell Piez <wapiez@xxxxxxxxxxxxxxxx>
Date: Fri, 01 Apr 2005 11:34:24 -0500
Re:  Testing 2 XML documents for equality - a solution
At 04:07 AM 4/1/2005, David wrote:
> Yes, such "equality" is not too useful and in fact is misleading.

although people seem to get by in XPath 1, where

'1' = 1 and 1 = 1.0
'1'      !=     1.0

I think we get away with this because the number of datatypes is small and thus the casting rules can simply be memorized; "equality" can be learned in that context. (Hint to XSLT 1.0 aspirants: learn the casting rules.)


Soon enough (if you're paying attention) you learn that XPath 1.0 "equality" isn't quite the operation you might expect. As such, you have to use it with some care, but once you understand how it works it's quite useful (and even, to a large extent, before that point).

It's a nice example, in fact, of how "equality" as we encounter it in practice (that is, as an operation that happens to be called "equality") may even sometimes fall short of the rigorous sense that Dimitre defined and that Mukul needs (if only implicitly) in order to specify his requirements with similar rigor.

Cheers,
Wendell



======================================================================
Wendell Piez                            mailto:wapiez@xxxxxxxxxxxxxxxx
Mulberry Technologies, Inc.                http://www.mulberrytech.com
17 West Jefferson Street                    Direct Phone: 301/315-9635
Suite 207                                          Phone: 301/315-9631
Rockville, MD  20850                                 Fax: 301/315-8285
----------------------------------------------------------------------
  Mulberry Technologies: A Consultancy Specializing in SGML and XML
======================================================================

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.