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RE: Schema based XML compare

  • From: "David Lee" <dlee@calldei.com>
  • To: "'Michael Kay'" <mike@saxonica.com>, <xml-dev@l...>
  • Date: Thu, 23 Dec 2010 12:21:22 -0500

RE:  Schema based XML compare

Thanks.

I was thinking about this, does it require a schema-aware parser (say Saxon PE) ?

I would presume so.

 

 

 

----------------------------------------

David A. Lee

dlee@calldei.com

http://www.xmlsh.org

 

From: Michael Kay [mailto:mike@s...]
Sent: Thursday, December 23, 2010 11:50 AM
To: xml-dev@l...
Subject: Re: Schema based XML compare

 

On 23/12/2010 12:29, David Lee wrote:

I've run into an age-old issue but I don’t see any off-the-shelf solutions for.

 

Suppose I have 2 XML documents I want to compare (not diff, just give me yes/no are they equivalent).

This is pretty simple to do even with things like ignoring whitespace options etc.  Many tools out there, including one I wrote

( http://www.xmlsh.org/CommandXcmp)

 

Now here's the twist …

 

Suppose I want to compare for XSD  data model equivalence, not XDM  equivalence ?

 

Example.

 

<number>1.0</number>

vs.

<number>1</number>

 

Without type annotation these are different.
But if I declare the type for number to  be xs:double

they should compare equal.

 

 

The XPath 2.0 deep-equal() function appears to do what you want here: it compares the typed values of the elements rather than their string values.

Michael Kay
Saxonica



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