Subject: RE: [xsl] Re: XPath 2.0: Problems with the two boolean constants true and false From: Dimitre Novatchev <dnovatchev@xxxxxxxxx> Date: Fri, 10 Oct 2003 01:18:52 -0700 (PDT) |
> > But if the Data Model were saying that 0 and 1 are not simply > > "string representations" (note that I didn't use '0' and '1' > > in my previous example but just 0 and 1 -- that is not the > > strins '0' and '1') but that 0 and 1 are *the* two xs:boolean > > constants, > > > > then > > > > it would make difference as the result of evaluating a > > boolean expression would be not a "representation" but a real > > (or native, or genuine) boolean value. > > > > Isn't it natural for a type to have its own genuine values > > and not only a "representation"? > > The boolean type does have its own genuine values. There are two of > these values, and they are delivered by the functions true() and > false(). > > I really can't see how choosing integers to represent these values helps > matters. The functions true() and false() are themselves defined using "The xs:boolean value 'true' and The xs:boolean value 'false'." http://www.w3.org/TR/xpath-functions/#d1e2699 Defining 'true' and 'false' using the functions true() and false() makes both definitions circular and incorrect. Therefore, there must be a way to define true and false independently from the functions true() and false() -- this definition must provide a means to determine if a given value "is the value true or is the value false" without referencing functions, which themselves are defined using the values true and false. ===== Cheers, Dimitre Novatchev. http://fxsl.sourceforge.net/ -- the home of FXSL __________________________________ Do you Yahoo!? The New Yahoo! Shopping - with improved product search http://shopping.yahoo.com XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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