[Om3] [Fwd: Re: OpenMath 2.0 standard binary encoding error]

[Paul Libbrecht]

James,

I would think the easy way would be to start this on trac.openmath.org  
or?

paul


Le 14-avr.-09 à 18:06, Professor James Davenport a écrit :

> I have received the following bug report in OMSTD 2.0 from Martin  
> Weber.
> I note there is no place on the OM site for 'errata' to the standard -
> optimism on our part! I assume everyone agrees that it IS an error.
> (a) We probably should have such - Paul: if you're prepared to start  
> one,
>    I'll write the associated document.
> (b) We must make sure it doesn't propagate into 3.0.
> James
>
>> I was surprised by an error in the standard which probably caused  
>> some
>> confusion/can cause some. It's about the binary encoding of numerals.
>> I quote:
>>
>> "Integers between -2^31 (-2147483648) and 2^31 - 1 (2147483647) are
>> encoded as
>> the small integer tag with the long flag set followed by the integer
>> encoded in little endian format in four bytes (network byte order:
>> the most significant byte comes first)" (from 3.2.2, Integers)
>>
>> Network byte order clearly is *big* endian, not little endian (as the
>> comment in parenthesis also suggests: MSB first).
> Absolutely.
>> Given that, if I recall correctly, you're also involved with the
>> emerging openmath standard, take this as a bug-report :)
> Will do - it certainly is, and I feel doubly embarrassed, as in my
> "otherwise" life I lecture on networking! I'll CC you on the bug  
> report.
>
> James Davenport
> Visiting Full Professor, University of Waterloo
> Otherwise:
> Hebron & Medlock Professor of Information Technology and
> Chairman, Powerful Computing WP, University of Bath
> OpenMath Content Dictionary Editor and Programme Chair, OpenMath 2009
> IMU Committee on Electronic Information and Communication
>
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