[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: XML Schema and international Booleans
> -----Original Message----- > From: Rick Jelliffe [mailto:ricko@a...] > Sent: Friday, November 12, 1999 12:32 AM > > > ISO creates international standards and im pretty sure that > {true,false} is not > > internationally accepted. Using zero (0) and one (1) is > certainly more > neutral and > > logical. > > No, because 0 and 1 do not carry implications of true or false to many > people. And 0 and 1 are Western symbols, so they are only > slightly more > "international" than "true" and "false". Also, don't forget that O is > used for "approve" and X is used for "disapprove" in some > countries, so > some people may expect 0 to mean "true". > I may be mistaken about this, but I'm pretty sure that Boolean logic has nothing to do with truth and falsity. It just needs two distinguishable values. If we wanted to be really up-to-the-minute, we could follow the usage of logicians and use U+22A4 (DOWN TACK) and U+22A5 (DOWN TACK) as the canonical values (notice I didn't say "as 'true' and 'false'); but we would be entirely justified in choosing "foo" and "bar". Whether the booleans are used to denote truth-values depends on the application, which should be able to express t/f in any language. I'm only half-joking about DOWN/UP TACK; DOWN TACK looks like a capital 'T', UP TACK looks like it's opposite, so the mapping the true/false is straightforward, but not part of the semantics of the symbols. Also about as language-neutral as it gets. So define schema semantics in terms of down/up tack, and define a few standard lexical mappings (e.g. to 'true' and 'false') that all implementations are required to understand. My two cents before I head back to the fox hole. -gregg P.S. I just love the phrase "international boolean". We certainly don't need no stinkin' national booleans. Although I understand the municipal booleans aren't bad in some places. ;) xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To unsubscribe, mailto:majordomo@i... the following message; unsubscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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