Relation sumo#related_external_concept (pm#string,?,sumo#language) used to signify a three-place relation between a concept in an external knowledge source, a concept in the SUMO, and the name of the other knowledge source
subtype: {sumo#synonymous_external_concept sumo#subsumed_external_concept sumo#subsuming_external_concept}
related_to: pm#related_to
type: pm#ternary_predicate_type__ternarypredicatetype class of predicates that require exactly three arguments
supertype: pm#relation_from_string (pm#string,*)
supertype: pm#relation_from_description_content/medium/container (pm#description_content/medium/container,*)
supertype: pm#relation_from/to_thing_of_common_kind (*) this type permits to categorize relations according to their signatures and hence offers (i) a concise way to set essential exclusion relations, and (ii) a systematic and easy-to-follow categorization
>part of: pm#relation__related_thing__relatedthing___related_with type for any relation (unary, binary, ..., *-ary) and instance of pm#relation_type