my $data=   '(?: [^<>&]+ | &\#?\w+; )+';

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should be 
my $data=   '(?: [^<&]+ | &\#?\w+; )+';

[download]

XML allows for unescaped ">"

In reply to Re^3: parsing XML fragments (xml log files) with... a regex by ikegami
in thread parsing XML fragments (xml log files) with XML::Parser by kgoess

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