List Info

Thread: xslt and math
xslt and math
user name
 2006-12-20 13:50:59 

  


  

    

I assume this is intended as a comment on the XPath 2.0 
specification, however the correct address for comments on that spec is w3.org">public-qt-commentsw3.org


 


The XPath 2.0 specification is currently a Proposed 
Recommendation and the time for considering new requirements on the spec is long 
past. It's true that the spec was a very long time in gestation, and that the 
use of XSLT in applications such as SVG generation, where trigonometric function 
support is needed, has grown during that time. The process of gathering 
requirements for future versions of XQuery and XPath has started, and it might 
therefore be a good idea to raise this requirement on the public-qt-comments 
list. Please supply more evidence of the requirement: it's not good enough just 
to say that math support is non-existent, you need to explain what mathematical 
functions you require, and what the applications are that require these 
functions. The same goes for rounding; if you want a different rounding 
algorithm from those currently available, you need to explain what 
algorithm you need, ;and why the existing algorithms are unsuited to 
your application. Ideally, please provide evidence of the requirement, for 
example references to national or international accounting 
standards.


 


The WGs have always taken the view that not all functions 
need to be in the core language. There's plenty of scope for function libraries 
(either specifications or implementations) to be made available by third 
parties. The EXSLT initiative (www.exslt.org) 
is one example of this, and you are welcome to contribute to it. EXSLT already 
includes a selection of mathematical functions, which are available in a number 
of XSLT 1.0 and XSLT 2.0 implementations, and it would be useful to know to what 
extent those functions meet your application needs.


 


Michael Kay


(personal response)




  

  

  From: xsl-editors-requestw3.org 
  [mailtosl-editors-requestw3.org] On Behalf Of Peter 
  Rushforth
Sent: 19 December 2006 11:33
To: 
  xsl-editorsw3.org
Subject: xslt and math


  

  
Hi,

  
 

  
My first comment is that math support is poor to 
  non-existent

  
in XSLT and should be incorporated directly in 
  the

  
language rather than forcing the user to use 
  java

  
or other extension functions.

  
 

  
Another comment I have is that the support for 
  rounding

  
provides only the limited and un-common default 
  mode

  
of round-half-to-even.  While this may be 
  theoretically 

  
sound, it isn't practical and forces us to use 
  java extension

  
functions.

  
 

  
Apart from this, everything is 
great.

  
 

  

  
  
   
     
    






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