You could use a lookup table. 
my %validators = (
   string => W3C::STRING,
   ...
);

my $type = $verify->{content}; 
my $validator = $validators{lc($type)};
if (!defined($validator) || !dvalid($search, $validator)) {
   die
}

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In reply to Re^3: Passing values to external packages by ikegami
in thread Passing values to external packages by genyded

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