For this example, assuming you've got all three lines stored as one string in $_: 
s/^.*[^>]$//gm;

[download]
That will delete any lines that don't end in a >. It will leave the newline from those lines, though. Season to taste.
Caution: Contents may have been coded under pressure.

In reply to Re: Regexp magic needed, truncate incomplete XML by Roy Johnson
in thread Regexp magic needed, truncate incomplete XML by starbuck

Title:
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