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Relationships
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reflexive relation |
Relation ?REL is reflexive iff (?REL ?INST ?INST) for all ?INST.
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symmetric relation |
A BinaryRelation ?REL is symmetric just iff (?REL ?INST1 ?INST2) imples (?REL ?INST2 ?INST1), for all ?INST1 and ?INST2.
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transitive relation |
A BinaryRelation ?REL is transitive if (?REL ?INST1 ?INST2) and (?REL ?INST2 ?INST3) imply (?REL ?INST1 ?INST3), for all ?INST1, ?INST2, and ?INST3.
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| Instances | cooccur | (cooccur ?THING1 ?THING2) means that the Object or Process ?THING1 occurs at the same time as, together with, or jointly with the Object or Process ?THING2. This covers the following temporal relations: is co-incident with, is concurrent with, is contemporaneous with, and is concomitant with. |
| | copy | relates an Object to an exact copy of the Object, where an exact copy is indistinguishable from the original with regard to every property except (possibly) spatial and/or temporal location. |
| | equivalent content class | A BinaryPredicate that relates two subclasses of ContentBearingPhysical. (equivalentContentClass ?CLASS1 ?CLASS2) means that the content expressed by each instance of ?CLASS1 is also expressed by each instance of ?CLASS2, and vice versa. An example would be the relationship between English and Russian editions of Agatha Christie's 'Murder on the Orient Express'. Note that (equivalentContentClass ?CLASS1 ?CLASS2) implies (subsumesContentClass ?CLASS1 ?CLASS2) and (subsumesContentClass ?CLASS2 ?CLASS1). |
| | equivalent content instance | A BinaryPredicate relating two instances of ContentBearingPhysical. (equivalentContentInstance ?OBJ1 ?OBJ2) means that the content expressed by ?OBJ1 is identical to the content expressed by ?OBJ2. An example would be the relationship between a handwritten draft of a letter to one's lawyer and a typed copy of the same letter. Note that (equivalentContentInstance ?OBJ1 ?OBJ2) implies (subsumesContentInstance ?OBJ1 ?OBJ2) and (subsumesContentInstance ?OBJ2 ?OBJ2). |
| | identical list items | (identicalListItems ?LIST1 ?LIST2) means that ?LIST1 and ?LIST2 have exactly the same items in their respective lists. Although ?LIST1 and ?LIST2 are required to share exactly the same items, they may order these items differently. |
| | related internal concept | Means that the two arguments are related concepts within the SUMO, i.e. there is a significant similarity of meaning between them. To indicate a meaning relation between a SUMO concept and a concept from another source, use the Predicate relatedExternalConcept. |