Conversion:type name

:a_bundle
   a conversion:ImplicitBundle;
   conversion:property_name foaf:knows;
   conversion:name_template "[/sd]person/[#2]/[r]";
   conversion:type_name     "Person";
.

or

:a_bundle
   a conversion:ImplicitBundle;
   conversion:property_name foaf:knows;
   conversion:name_template "[/sd]person/[#2]/[r]";
   conversion:type_name     foaf:Person;
.