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Re: [ht@inf.ed.ac.uk: Re: [xml-dev] RE: Schema vs Schema-free]

From: Mike Cowlishaw <MFC@uk.ibm.com>
Date: Thu, 15 Apr 2004 14:05:53 +0100
To: Noah Mendelsohn <noah_mendelsohn@us.ibm.com>
Cc: jcowan@reutershealth.com, www-xml-schema-comments@w3.org
Message-ID: <OF0023ACF6.89C8F9FA-ON80256E77.0046E771-80256E77.0047CCC6@uk.ibm.com>

John, just to add to Noah's e-mail:  the current draft of the proposed 
revision (754r) of the IEEE 754 standard is at:

     http://754r.ucbtest.org/

The IEEE committee revising the standard has agreed that the very small 
cost of preserving 'precision' in the sense the XML schema group use that 
term is justified.  Of course, the resulting data type may also be used 
for implementing interval arithmetic -- indeed one of the major concerns 
of the committee has been to ensure the mathematical soundness of the 
proposal.

For background, see my paper "Decimal Floating-Point: Algorism for 
Computers", available at:

   http://www2.hursley.ibm.com/decimal/IEEE-cowlishaw-arith16.pdf

and also the FAQ, bibliography, etc., at the URL below.

Mike 

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Mike Cowlishaw, IBM Fellow
IBM UK (MP5), PO Box 31, Birmingham Road, Warwick, CV34 5JL
mailto:mfc@uk.ibm.com  --  http://www2.hursley.ibm.com/decimal
Received on Thursday, 15 April 2004 09:06:59 UTC

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