While relation and relationship refer to the connection between two things, relation shades more toward the way things are connected, while relationship refers to the connection itself.
From that it looks like "RelationshipType" would be equivalent to "Relation" in our context?
https://english.stackexchange.com/questions/15208/relation-versus-relationship
While relation and relationship refer to the connection between two things, relation shades more toward the way things are connected, while relationship refers to the connection itself.
From that it looks like "RelationshipType" would be equivalent to "Relation" in our context?