I now have:- 
((?:^DES|^TN).*?(?:(?:DATE|ZONE)[ A-Z0-9]*)(?=$^$)?)

[download]
But given the data I posted earlier it still matches ZONE even when not followed by blank line.

Trying to use (?=$^$)? to say only match the previous pattern if followed by the first blank line.

But given data :- 

TN   001 0 02 01
     05 RLS
ZONE 001
     07 AO3
     08
     09
DATE  9 MAR 2000

[download]
Only matches upto ZONE and not DATE.

In reply to Re: Re: Regex Question by set_uk
in thread Regex Question by set_uk

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