Subject: Re: [xsl] XSLT 2.0 format-number() question From: Jeni Tennison <jeni@xxxxxxxxxxxxxxxx> Date: Thu, 20 Jun 2002 09:59:18 +0100 |
Hi Mike, > XSLT 2.0 says, regarding format-number(): > > "The number is supplied as the value of the first argument. The > required type of this argument is xsd:double; if the value is not of > the right type, it is converted using the standard conversion rules" > > I'd like this to be more clear. What are "the standard conversion > rules"? > > I have an idea what they are, but I'd like to not have to guess. Can > we get an actual reference in there? The functions defined in XSLT 2.0 are specified as being "XSLT-specific additions to the core XPath function library", so it's not too big a leap to get to the "function conversion rules" described in Section 2.2.4 of XPath 2.0 (http://www.w3.org/TR/xpath20/#id-function-calls), but I agree that it wouldn't hurt to have a reference to this section at the beginning of Section 14 of the XSLT 2.0 spec. > I also noticed XSLT 1.0's format-number() doesn't say that the > conversion of the first argument to a number occurs at all; should I > assume that it does? In Section 3.2 of the XPath 1.0 spec (http://www.w3.org/TR/xpath#section-Function-Calls) it says (my emphasis): "A FunctionCall expression is evaluated by using the FunctionName to identify a function in the expression evaluation context function library, evaluating each of the Arguments, **converting each argument to the type required by the function**, and finally calling the function, passing it the converted arguments." Since calls to the format-number() function are just like calls to any other function, and format-number() is defined as requiring a number as its first argument, I think it's reasonable to assume that the first argument to format-number() gets converted to a number. Cheers, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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