This question kept nagging at me. I took another look and found the following parameter that can be passed to your XML::Parser constructor: 
my $p = XML::Parser->new(
  ParseParamEnt => 0,
);

[download]
Also it comes in handy to do your own error handling when dealing with crufty XML -- otherwise the parser will fatally croak: 
my $p = XML::Parser->new(
  ErrorContext  => 2,
  ParseParamEnt => 0,
);

[download]

FYI, ParseParamEnt appears to only apply to Expat under the hood.

Cheers,
Matt

In reply to Re: Using XML::Parser on a file without a !DOCTYPE line by mojotoad
in thread Using XML::Parser on a file without a !DOCTYPE line by moleary

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