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Although you have solved your problem already by other means, but let's check 
other possibilities.

On 08/01/2013 at 21:45, gordom <> wrote:

In "real" life :-) there are lines starting with letters also. Only
these with "Set:" at the beginning should be left, rest is going to be

By looking at this sample, I see three more patterns that could get work done.
1. It seems that only lower-case letters are in "Set", which is in lines you 
want preserve. So maybe looking for lines containing only numbers and upper-
case letters will do the trick.
2. In this sample, spaces are only in lines you want to preserve. What about 
matching lines without whitespace characters?
3. It looks like colon happens only in lines you want to delete. Match lines 
without colons, maybe?

I'm surprised that there is no simple way to find everything except

Well, regexps are most often used in programming languages or tools like grep, 
where you can easily get "reverse match" mode (print everything that does NOT 
match). But LO is not programming language and it's simple regexp engine is 
simply not sophisticated enough in many cases.

I have read somewhere on TDF wiki about incorporating mature regexp library in 
LO, but this idea was rejected due to portability issues. LO must run on 
Windows and OS X as well as on Linux, whereas library in question runs only on 
Best regards
Mirosław Zalewski

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