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

RE: regular expression question

regular expression date
There's a tortured history here. The original Schema Rec had an ambiguous
syntax for such regular expressions. To solve this problem, an erratum was
issued banning them. This erratum was incorporated in the PER of 18 March
2004. However, there were objections from vendors and users that this was an
incompatible change. Therefore, in the Second Edition of 28 Oct 2004, these
expressions were re-allowed, with accompanying prose that (supposedly)
explains how to disambiguate them. [However, I've recently raised comments
saying that the prose does nothing of the kind...].

Saxon-SA 8.5 is implementing the rules in the PER, the next release will
relax the restrictions on use of "-" in a character range to implement the
2nd Ed as best I can, given that the rules are still unclear.  

> But to my surprise the same regular expression is accepted by a
> dedicated regular expression engine (RegExBuddy), who clearly 
> indicates
> that it is the character itself we are after.

There are many different dialects of regular expressions, and the fact that
a particular tool accepts a particular expression is very little evidence of

Michael Kay


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.
First Name
Last Name
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.