On 4 Apr, 17:08, ror...@gmail.com wrote:
> On Apr 3, 12:46 pm, use...@tech-know-ware.com wrote:
>
.=2E.
> > It looks to me that Bj=F6rn's pattern achieves this.  (Which filling in
> > the dots would be:
>
> > (^[ dgHhMmstyf,\-\./:;\\]|'[^']*')*
>
> > Can you do a test program and show some examples where it does not
> > work?
>
> The pipe(|) in you regular expression means 'or' right? If so then you
> can only have the characters dgHhMmstyf,\-\./:;\\ OR characters in
> quotes but not both in the same string so you can have:
>
> dddd, d. MMMM yyyy
> OR
> 'ab$olutN0n$en$e'
> But not
>
> dddd, d. MMMM yyyy 'ab$olutN0n$en$e'
>
> Does this make sense?

But that's then wrapped in a set of brackets and a *.  So you can have
any number of occurences of:

dddd, d. MMMM yyyy
OR
'ab$olutN0n$en$e'

which means you can have:

dddd, d. MMMM yyyy 'ab$olutN0n$en$e'

Note the pattern mentioned earlier is wrong.  To match Bjorn's
suggestion it should not have had the first ^, so it becomes:

([ dgHhMmstyf,\-\./:;\\]|'[^']*')*

I recommend loading the pattern into whatever is the most convenient
regular expression parser for you such as Perl, PHP, Java, C#,
Javascript, and developing a number of test cases.  Then check that
each one passes or fails as is appropriate.  Then where there's
errors, list them here.

If you don't have a convenient regular expression engine locally you
might be able to download a pure regular expression tester, or do
something on the web such as: http://www.nvcc.edu/home/drodgers/ceu/resourc=
es/test_regexp.asp

BTW - when testing a regular expression destined for a schema on a
normal regular expression engine, remember to put ^ and $ anchors
around it.

HTH,

Pete.
--
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Pete Cordell
Tech-Know-Ware Ltd
for XML to C++ data binding visit
http://www.tech-know-ware.com/lmx/
http://www.codalogic.com/lmx/
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