Relation pm#object_relation (?,?)
  exclusion:  pm#attributive_relation  pm#mereological_relation  pm#intentional_relation  pm#temporal_relation
  supertype:  pm#relation_playing_a_special_role  this type permits to categorize relations according to their roles ; this is a traditional but quite subjective way of categorizing relations
  subtype:  pm#object__patient___theme__theme (pm#situation,?)
     subtype:  pm#input (pm#process,?)
        subtype:  pm#material (pm#process,?)
        subtype:  pm#parameter (pm#process,?)
     subtype:  pm#input_output__inputoutput (pm#process,?)
        subtype:  pm#modified_object (pm#process,?)
           subtype:  pm#muted_object__mutedobject (pm#process,?)
        subtype:  pm#deleted_object__deletedobject (pm#process,?)
     subtype:  sumo#patient (sumo#process,?)  the 2nd argument may be moved, said, experienced, etc; the direct objects in 'The cat swallowed the canary' and 'Billy likes the beer' would be examples of patients; the patient of a process may or may not undergo structural change as a result of the process
        subtype:  sumo#instrument (sumo#process,sumo#object)  the 2nd argument is used in bringing about the first and is not changed by it, e.g., the key is an instrument in 'the key opened the door'; instrument and resource cannot be satisfied by the same ordered pair
        subtype:  sumo#resource (sumo#process,sumo#object)  the object is present at the beginning of the process, is used by it, and as a consequence is changed by it; for example, soap is a resource in 'the gun was carved out of soap'; resource differs from instrument in that its internal or physical properties are altered in some way by the process
        subtype:  sumo#result (sumo#process,?)  the 2nd argument is the product of the process, e.g., house is a result in 'Eric built a house'
  subtype:  pm#domain_object (pm#domain,?)
     subtype:  pm#core_domain_object__central_object_of_domain (pm#domain,?)