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Subject: Re: [office-formula] Portability and conformance


Eike Rathke wrote:
> Hi Patrick,
> On Saturday, 2009-12-19 16:06:35 -0500, Patrick Durusau wrote:
>> Just so I remember to capture it, under the various bit operators, not  
>> that there is a portability constraint but then under semantics, an  
>> implementation must support at least up to 48 bits. No mention of  
>> portability.
> There are portable constraints 0 <= x < 2^48
>> (Yes, I will change "implementation" but this sounds like, looks like,  
>> walks like a constraint on evaluators and not on expressions.
> It is a constraint of the expression to be portable, an evaluator shall
> support at least 48 bits.
You mean that in order to support the portability of a certain class of 
expressions, evaluators are constrained to support a minimal set of values.

Sure, there is an interaction between the constraints on the capacities 
of evaluators and constraints/guidance on expressions that result in 
their being "portable."

Hope you are at the start of a great day!


Patrick Durusau
Chair, V1 - US TAG to JTC 1/SC 34
Convener, JTC 1/SC 34/WG 3 (Topic Maps)
Editor, OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor, ISO/IEC 13250-1, 13250-5 (Topic Maps)

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