Re: Date Difference
On 12/21/05, Michael Kay <mike@xxxxxxxxxxxx> wrote: > > Just to be clear on this one, there is no such function as > > op:subtract-dates() (or any prefixed with op:) and it's in the CR > > purely to demonstrate $earlier and $later? Is that what you are > > saying? > > There is no function with this name available to users (and to make this > perfectly clear, we refrained from telling anyone what the namespace uri for > "op:" was). It's a formal specification device to define the semantics of > the "-" operator when the arguments are dates. > > To be honest, the way the specifications of XPath operators are described > was for the convenience of the authors, not the readers. (Why does it take > more than ten times as many pages to specify XPath 2.0 as it took for XPath > 1.0? Answer: because it was done by a bigger committee). I tried to get it > changed, but the change was considered too risky. The argument is always > that users who can't follow the spec can always buy themselves a book. Thanks, that's an interesting way of doing it I guess. It certainly keeps the barrier up between the casual reader and the spec :) (nb. I *know* the spec isn't written for the casual reader I'm just making a joke - listing functions that don't actually exist is a great new form obfuscation...)
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