Dear Monks, I parse a file of the following structure: 
Titel Text (A12-3)
3-123.7 Just another text 3-123.8 Some more text
A12.34 Another item B56.78 Yet another item
Another Titel Text (B23-9)
1-22a.b Just another text 
2-3cd.e Some more text
W12.34 Another item 
Z56.78 Yet another item

[download]
The lines with parenthesis at the end are to become the titels, the other lines should be linked to these titels this way: 
Titel Text (A12-3);3-123.7 Just another text
Titel Text (A12-3);3-123.8 Some more text
Titel Text (A12-3);A12.34 Another item
Titel Text (A12-3);B56.78 Yet another item

[download]
As you see some the "other lines" should begin with the certain pattern, sometimes they do not and build a single line. I tried to break these lines with a newline character in the following way (thanks to toolic and Marschall since I used some fragments from their earlier advices) but the actual script seems to ignore the added newline. 

use strict;
use warnings;

my $outcome;
my $previous;

while(<DATA>)    {
        $outcome = "";
        chomp;
                
        $_=~ s/\s(\d\-\d\w{2}(\.\w+)?)/\n$1/g;
        $_=~ s/\s([A-Z]\d{2}(\.\d+)?)/\n$1/g;
        
                
            
        if (/\s?\d\-\d\w{2}(\.\w+)?.+|\s?[A-Z]\d{2}(\.\d+)?.+|\(\w+\-\
+d+\)$/)
        
            {
                
                
                if (/\(\w+\-\d+\)$/ )    {                     
                    
                    $previous = $_;
                    }
                    else    {
                    
                    
                    $outcome = "$previous;$_";
                    }
            $outcome=~s/^\s+$//g;                                
            
            print  "$outcome\n";
            }        
            
}

__DATA__
Titel Text (A12-3)
3-123.7 Just another text 3-123.8 Some more text
A12.34 Another item B56.78 Yet another item
Another Titel Text (B23-9)
1-22a.b Just another text 
2-3cd.e Some more text
W12.34 Another item 
Z56.78 Yet another item
Some trash
Some trash

[download]
Where do I make the mistake(s)? I work on Win32 with ActivePerl distribution. Thank you very much in advance! VE

In reply to Insert newline by Anonymous Monk

Title:
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