OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   RE: [xml-dev] XPath 1.5? (was RE: [xml-dev] typing and markup)

[ Lists Home | Date Index | Thread Index ]

> Yes. Having a tool that can show you where you're eating 
> cycles is probably more useful day to day than an optimizing 
> compiler will ever be. Optimizing the compiler may be solving 
> the wrong problem: I don't need it optimized, I just need the 
> resource intensive bits pointed out to me.

It's probably possible to classify the rewrites that Saxon does into
three categories:

(a) a rewrite to an expression that the user could reasonably have
written themselves, for example:

    if (count(x) > 0)
    if (exists(x))

(b) a rewrite to an expression that the user could have written, but
which would damage readability, for example the pattern


(c) a rewrite to an expression that's not available in the surface
syntax at all, for example


But in none of the examples above would I describe the user's original
expression as incorrect or in need of improvement.

(These are all rewrites that can be done without schema knowledge, of
course, because Saxon has no schema knowledge at present).

Michael Kay
Software AG
home: Michael.H.Kay@ntlworld.com
work: Michael.Kay@softwareag.com 


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS