[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Formal specifications (was: Who can implement W3C XML Schema ?)


formal specification xml
Jonathan Robie wrote:

> Yes, the problem with XML Schema is that is pseudo-formal. It has the 
> precision of prose and the easy readability of mathematical notation. The 
> Schema Formal Description tries to make this completely formal, but this 
> work has never been completed.


To come back on this important issue, IMO a specification should use 
either a formal description language or plain natural language (or both).

This reminds me of a specification language named SDL (normalized by the 
CCITT) I have been using in the 80's. The great thing with such a 
language was that you could run simulations and test your 
specifications. I remember having specified a project using SDL and 
having detected design flaws on tests scenarios before having written a 
single line of code (it was not eXtreme Programming but eXtreme 
Specifications!).

This language was not so far from what is needed to specify the 
implementation of a schema language since it was especially well 
featured for describing finite state machines.

I have not used it since the 90's, but there seem to have been some 
convergences with UML-RT recently.

If the purpose of a spec such has W3C XML Schema part1 is to describe 
the validation algorithm why not using such a language completed by a 
plain English description?

Eric
-- 
See you in Paris.
                      http://www.afnet.fr/afnet/net200x/programme.html#T9
------------------------------------------------------------------------
Eric van der Vlist       http://xmlfr.org            http://dyomedea.com
http://xsltunit.org      http://4xt.org           http://examplotron.org
------------------------------------------------------------------------


PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
 

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.


Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.