Andreas,
Andreas J. Guelzow wrote:
> On Fri, 2009-12-11 at 09:17 -0500, Patrick Durusau wrote:
>
>> Greetings,
>>
>> When looking at TYPE I read:
>>
>>
>>> Portable documents *shall not* depend on receiving a value of 4.
>>>
>>>
>> Since TYPE returns a number indicating a value type, I am not real sure
>> what it means to "not depend on receiving a value of 4." ???
>>
>> BTW, 4 is logical.
>>
>> So a portable document could accept some other number for logical type?
>> Or doesn't recognize logical type? Or if it does, then it isn't a
>> portable document?
>>
>>
>
> 4.4:
> Logical values may be implemented as a distinct, distinguishable type
> from numbers, so that ISNUMBER(TRUE()) and ISLOGICAL(1) evaluates to
> FALSE(). However, logical values may also be implemented as a subtype of
> Number, where TRUE() simply returns 1 and FALSE() simply returns 0. Note
> that due to the implicit conversion operator ´Number to
> Logical¡ (discussed below), when a number is passed as a condition, 0 is
> considered False and all other numeric values are considered True.
>
> So there may not be a Logical type. For example OOo does not implement a
> LOGICAL type.
>
>
Well, but saying that a "portable" document doesn't accept some
particular value isn't the same thing as saying that a portable document
doesn't support Logical type.
Hope you are having a great day!
Patrick
--
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)
