casts << {:long=>'step', :short=>'s', :type=>'uint', :mandatory=>false, :default=>1, :allowed=>nil, :disallowed=>"0"}
casts << {:long=>'min_score', :short=>'m', :type=>'float', :mandatory=>false, :default=>0.5, :allowed=>nil, :disallowed=>nil}
casts << {:long=>'max_hits', :short=>'h', :type=>'uint', :mandatory=>false, :default=>7, :allowed=>nil, :disallowed=>"0"}
-casts << {:long=>'max_diversity', :short=>'h', :type=>'uint', :mandatory=>false, :default=>5, :allowed=>nil, :disallowed=>nil}
+casts << {:long=>'max_diversity', :short=>'M', :type=>'uint', :mandatory=>false, :default=>5, :allowed=>nil, :disallowed=>nil}
casts << {:long=>'query_ids', :short=>'Q', :type=>'flag', :mandatory=>false, :default=>nil, :allowed=>nil, :disallowed=>nil}
casts << {:long=>'subject_ids', :short=>'S', :type=>'flag', :mandatory=>false, :default=>nil, :allowed=>nil, :disallowed=>nil}
casts << {:long=>'realign', :short=>'r', :type=>'flag', :mandatory=>false, :default=>nil, :allowed=>nil, :disallowed=>nil}