use abstractor;      #there is no real name yet

my $output = abstractor->new();

$output->load_definitions(  
                             # dirpath to definitions dir
                            );
#or

$output->add_definitions ( { a => 'print "HELLO"',
                             b => 'print "WORLD"',
                             c => 'print "!!"' } )


$output->compute("<a></a> <b></b> <c></c>");