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Relationships
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relation |
The Class of relations. There are two kinds of Relation: Predicate and Function. Predicates and Functions both denote sets of ordered n-tuples. The difference between these two Classes is that Predicates cover formula-forming operators, while Functions cover term-forming operators.
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| Instances | assignment | If F is a Function with a value for the objects denoted by N1,..., NK, then (AssignmentFn F N1 ... NK) is the value of applying F to the objects denoted by N1,..., NK. Otherwise, the value is undefined. |
| | contrary attribute | A contraryAttribute is a set of Attributes such that something can not simultaneously have more than one of these Attributes. For example, (contraryAttribute Pliable Rigid) means that nothing can be both Pliable and Rigid. |
| | disjoint decomposition | A disjointDecomposition of a Class C is a set of subclasses of C that are mutually disjoint. |
| | exhaustive attribute | This predicate relates a Class to a set of Attributes, and it means that the elements of this set exhaust the instances of the Class. For example, (exhaustiveAttribute PhysicalState Solid Fluid Liquid Gas Plasma) means that there are only five instances of the class PhysicalState, viz. Solid, Fluid, Liquid, Gas and Plasma. |
| | exhaustive decomposition | An exhaustiveDecomposition of a Class C is a set of subclasses of C such that every instance of C is an instance of one of the subclasses in the set. Note: this does not necessarily mean that the elements of the set are disjoint (see partition - a partition is a disjoint exhaustive decomposition). |
| | greatest common divisor | (GreatestCommonDivisorFn ?NUMBER1 ?NUMBER2 ... ?NUMBER) returns the greatest common divisor of ?NUMBER1 through ?NUMBER. |
| | Latitude | LatitudeFn is a VariableArityRelation used to denote a parallel of latitude. Examples: (LatitudeFn North (MeasureFn 38.0 AngularDegree)), (LatitudeFn South (MeasureFn 23.0 AngularDegree) (MeasureFn 30.0 ArcMinute)), (LatitudeFn South (MeasureFn 60.0 AngularDegree) (MeasureFn 0.0 ArcMinute) (MeasureFn 0.0 ArcSecond)), (LatitudeFn North (MeasureFn 42.0 AngularDegree) (MeasureFn 7.89 ArcMinute)). |
| | least common multiple | (LeastCommonMultipleFn ?NUMBER1 ?NUMBER2 ... ?NUMBER) returns the least common multiple of ?NUMBER1 through ?NUMBER. |
| | list | A Function that takes any number of arguments and returns the List containing those arguments in exactly the same order. |
| | Longitude | (LongitudeFn ?DIRECTION @ROW) denotes a meridian of longitude. Note that LongitudeFn is a VariableArityRelation. Examples: (LongitudeFn East (MeasureFn 180.0 AngularDegree)), (LongitudeFn West (MeasureFn 122.0 AngularDegree) (MeasureFn 24.0 ArcMinute)), (LongitudeFn East (MeasureFn 121.0 AngularDegree) (MeasureFn 0.0 ArcMinute) (MeasureFn 15.0 ArcSecond)), (LongitudeFn West (MeasureFn 80.0 AngularDegree) (MeasureFn 6.78 ArcMinute)). |
| | partition | A partition of a Class C is a set of mutually disjoint classes (a subclass partition) which covers C. Every instance of C is an instance of exactly one of the subclasses in the partition. |
| | process list | The arguments of this relation are data structures, each of which contains the information necessary for the process already loaded by the operating system to execute on a processor. |