$Id: daml+oil-2000-12.daml,v 1.1 2003-04-08 14:29:13 ian_dickinson Exp $ Thing The most general class in DAML. This is equal to the union of any class and its complement. the class with no things in it. for equivalentTo(X, Y), read X is an equivalent term to Y. for sameClassAs(X, Y), read X is an equivalent class to Y. cf OIL Equivalent for samePropertyAs(P, R), read P is an equivalent property to R. disjointWith for disjointWith(X, Y) read: X and Y have no members in common. cf OIL Disjoint Disjoint for type(L, Disjoint) read: the classes in L are pairwise disjoint. i.e. if type(L, Disjoint), and C1 in L and C2 in L, then disjointWith(C1, C2). cf OIL Disjoint unionOf for unionOf(X, Y) read: X is the union of the classes in the list Y; i.e. if something is in any of the classes in Y, it's in X, and vice versa. cf OIL OR disjointUnionOf for disjointUnionOf(X, Y) read: X is the disjoint union of the classes in the list Y: (a) for any c1 and c2 in Y, disjointWith(c1, c2), and (b) unionOf(X, Y). i.e. if something is in any of the classes in Y, it's in X, and vice versa. cf OIL disjoint-covered for intersectionOf(X, Y) read: X is the intersection of the classes in the list Y; i.e. if something is in all the classes in Y, then it's in X, and vice versa. cf OIL AND for complementOf(X, Y) read: X is the complement of Y; if something is in Y, then it's not in X, and vice versa. cf OIL NOT for oneOf(C, L) read everything in C is one of the things in L; This lets us define classes by enumerating the members. cf OIL OneOf Restriction something is in the class R if it satisfies the attached restrictions, and vice versa. for onProperty(R, P), read: R is a restricted with respect to property P. for onProperty(R, P) and toClass(R, X), read: i is in class R if and only if for all j, P(i, j) implies type(j, X). cf OIL ValueType for onProperty(R, P) and hasValue(R, V), read: i is in class R if and only if P(i, V). cf OIL HasFiller hasClass for onProperty(R, P) and hasClass(R, X), read: i is in class R if and only if for some j, P(i, j) and type(j, X). cf OIL HasValue minCardinality for onProperty(R, P) and minCardinality(R, n), read: i is in class R if and only if there are at least n distinct j with P(i, j). cf OIL MinCardinality maxCardinality for onProperty(R, P) and maxCardinality(R, n), read: i is in class R if and only if there are at most n distinct j with P(i, j). cf OIL MaxCardinality cardinality for onProperty(R, P) and cardinality(R, n), read: i is in class R if and only if there are exactly n distinct j with P(i, j). cf OIL Cardinality hasClassQ property for specifying class restriction with cardinalityQ constraints minCardinality for onProperty(R, P), minCardinalityQ(R, n) and hasClassQ(R, X), read: i is in class R if and only if there are at least n distinct j with P(i, j) and type(j, X). cf OIL MinCardinality maxCardinality for onProperty(R, P), maxCardinalityQ(R, n) and hasClassQ(R, X), read: i is in class R if and only if there are at most n distinct j with P(i, j) and type(j, X). cf OIL MaxCardinality cardinality for onProperty(R, P), cardinalityQ(R, n) and hasClassQ(R, X), read: i is in class R if and only if there are exactly n distinct j with P(i, j) and type(j, X). cf OIL Cardinality NonNegativeInteger Nonnegative integers are used in cardinality restrictions for inverseOf(R, S) read: R is the inverse of S; i.e. if R(x, y) then S(y, x) and vice versa. cf OIL inverseRelationOf TransitiveProperty if P is a TransitiveProperty, then if P(x, y) and P(y, z) then P(x, z). cf OIL TransitiveProperty. UniqueProperty compare with maxCardinality=1; e.g. integer successor: if P is a UniqueProperty, then if P(x, y) and P(x, z) then y=z. cf OIL FunctionalProperty. UnambiguousProperty if P is an UnambiguousProperty, then if P(x, y) and P(z, y) then x=z. aka injective. e.g. if nameOfMonth(m, "Feb") and nameOfMonth(n, "Feb") then m and n are the same month. the empty list; this used to be called Empty. for item(L, I) read: I is an item in L; either first(L, I) or item(R, I) where rest(L, R). Ontology An Ontology is a document that describes a vocabulary of terms for communication between (human and) automated agents. versionInfo generally, a string giving information about this version; e.g. RCS/CVS keywords imports for imports(X, Y) read: X imports Y; i.e. X asserts the* contents of Y by reference; i.e. if imports(X, Y) and you believe X and Y says something, then you should believe it. Note: "the contents" is, in the general case, an il-formed definite description. Different interactions with a resource may expose contents that vary with time, data format, preferred language, requestor credentials, etc. So for "the contents", read "any contents".