RE: F&O: Non-capturing sub-expressions

Bjoern:
I have added your comment to Bugzilla.
In the future, please enter bugs/comments directly into bugzilla:
http://www.w3.org/Bugs/Public/

Product: XPath/XQuery/XSLT
Component: Functions and Operators
Version: Last Call Drafts

All the best, Ashok
 

> -----Original Message-----
> From: public-qt-comments-request@w3.org 
> [mailto:public-qt-comments-request@w3.org] On Behalf Of 
> Bjoern Hoehrmann
> Sent: Saturday, January 14, 2006 7:12 AM
> To: public-qt-comments@w3.org
> Subject: F&O: Non-capturing sub-expressions
> 
> 
> Dear XML Query Working Group,
> Dear XSL Working Group,
> 
>   http://www.w3.org/TR/2005/CR-xpath-functions-20051103/ 
> extends the semantics of the regular expressions defined in 
> XML Schema 1.0 to allow for capture buffers; I would like to 
> re-use regular expressions as de- fined in the candidate 
> recommendation in a DTLL-like format, but an imporant 
> requirement is automatic assignment of names for the captured 
> substrings based on the index number of the parenthesized 
> sub-expression as defined in the technical report.
> 
> This is not feasible however with the current syntax as it 
> does not allow non-capturing sub-expressions, so I would have 
> to further extend the format which makes sharing of regular 
> expressions and regex engines difficult. In fact, in order to 
> re-use regular expressions as found on many web sites and 
> programs, and as produced by many tools, one would first have 
> to re-write them to fit into this model.
> 
> I thus think the regular expression syntax should further be 
> extended to allow for non-capturing sub-expressions using a 
> syntax like (?:...) as is available in most other regular 
> expression formats.
> 
> regards,
> --
> Björn Höhrmann · mailto:bjoern@hoehrmann.de · 
> http://bjoern.hoehrmann.de Weinh. Str. 22 · Telefon: 
> +49(0)621/4309674 · http://www.bjoernsworld.de
> 68309 Mannheim · PGP Pub. KeyID: 0xA4357E78 · 
> http://www.websitedev.de/ 
> 
> 
>

Received on Sunday, 15 January 2006 19:34:13 UTC