Relation pm#relation_from_attribute_or_quality_or_measure (attribute_or_quality_or_measure,*)
exclusion: relation_from_situation spatial_relation_from_entity_with_spatial_feature relation_from_collection relation_from_description_content/medium/container
supertype: 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
subtype: extension_fn__extensionfn (Attribute -> class) a unary_function that maps an attribute into the class whose condition for membership is the attribute
subtype: relation_to_another_attribute_or_quality_or_measure (attribute_or_quality_or_measure,attribute_or_quality_or_measure)
subtype: measure (attribute_or_quality_or_measure,attribute_or_quality_or_measure) e.g., [a weight, measure: 75 kg]
subtype: q_location__qlocation (quality,region)
subtype: has_quale__hasquale__ql (quality,quale)