Problem with regular expression with Xquery

[David Carlisle]

On 24/02/2010 19:52, Kenneth Dougherty wrote:
> Hello,
>
> The following problem has me stumped, and I would be grateful for any help.
>
> I am using a regular expression to test if a document number is correct.
> The number can end with either ‘P,’ ‘&P,’ or it may not have an ending
> value outside of the regular number.
>
> For example, if a valid document number was 503-302, it could be
> 503-302P, 503-302&P, or just 503-302.
>
> The incorrect regular expression so far is: [0-9]{3}\-[0-9]{3}&P|P.

[0-9]{3}\-[0-9]{3}(&?P)?


David