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Re: Fun with regular expressions

• To: Robin Berjon <robin.berjon@e...>
• Subject: Re: Fun with regular expressions
• From: Max Chappell <max@m...>
• Date: Wed, 04 Feb 2004 16:19:50 +0000
• Cc: "'xml-dev@l...'" <xml-dev@l...>
• In-reply-to: <40210E1F.7020608@e...>
• Organization: Maxxml Limited
• References: <40210BE6.4010905@m...> <40210E1F.7020608@e...>
• Reply-to: max@m...
• User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax)

Robin Berjon wrote:

> Max Chappell wrote:
>
>> Another piece of advice is to use nested brackets such as: 
>> "[a-zA-Z-[ABC]]" (Use any letters except AB or C).
>> Along these lines I've tried:
>> "[.-[NaN]]*" - far from working...
>
>
> Does something like (.-[Na])+ work? I'm unsure that . is a proper 
> character class that's subject to substraction.
>        

        The type declaration is based upon xs:double, restricting 
further by the use of pattern should mean the two patterns are ANDed 
together. I was working
        on a vague assumption that . works like a 'super' character 
class for ANDed patterns.
        I'm not convinced about the use of . either - However, since I 
find regular expressions as much fun as pulling teeth, I thought I'd 
give it a go..
       

>> This does not allow .00009 for example, so we'll have to make the reg 
>> exp even more complicated.
>
>
> I believe I have one somewhere that's close to being good and that 
> could exclude NaN. However it's several lines long (when wrapped) and 
> last year it tended to crash validators. I can dig it up if you don't 
> find a pleasant solution. 


    I may well take you up on that offer!

thanks

>
>

• References:
  • Fun with regular expressions
    • From: Max Chappell <max@m...>
  • Re: Fun with regular expressions
    • From: Robin Berjon <robin.berjon@e...>

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