NAME

       TM::Analysis - Topic Maps, analysis functions

SYNOPSIS

         use TM::Materialized::AsTMa;
         my $tm = new TM::Materialized::AsTMa (file => 'test.atm');
         $tm->sync_in;

         Class::Trait->apply ($tm, 'TM::Analysis');

         print Dumper $tm->statistics;

         print Dumper $tm->orphanage;

DESCRIPTION

       This package contains some topic map analysis functionality.

INTERFACE

       statistics
           This (currently quite limited) function computes a reference to hash containing the
           following fields:

           "nr_toplets"
               Nr of midlets in the map. This includes ALL midlets for topics and also those for
               assertions.

           "nr_asserts"
               Nr of assertions in the map.

           "nr_clusters"
               Nr of clusters according to the "cluster" function elsewhere in this document.

       orphanage
           This computes all topics which have either no supertype and also those which have no
           type. Without further parameters, it returns a hash reference with the following
           fields:

           "untyped"
               Holds a list reference to all topic ids which have no type.

           "empty"
               Holds a list reference to all topic ids which have no instance.

           "unclassified"
               Holds a list reference to all topic ids which have no superclass.

           "unspecified"
               Holds a list reference to all topic ids which have no subclass.

           Optionally, a list of the identifiers above can be passed in so that only that
           particular information is actually returned (some speedup):

              my $o = TM::Analysis::orphanage ($tm, 'untyped');

       entropy
           This method returns a hash (reference) where the keys are the assertion types and the
           values are the individual entropies of these assertion types. More frequently used
           (inflationary) types will have a lower value, very seldomly used ones too. Only those
           in the middle count most.

SEE ALSO

       TM

COPYRIGHT AND LICENSE

       Copyright 20(0[3-68]|10) by Robert Barta, <drrho@cpan.org>

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.