Relation pm#relation_from_type (type,*)  type of relations from a concept/relation type, i.e. in RDFS terminology, from a class or a property
  supertype:  relation_from_collection
  subtype:  specializing_type (type,?)
     subtype:  instance (type,?)  the ':' link in the FT notation
     subtype:  subtype__subtype_or_equal (type,type)  subtype links should actually be strict subtype links or not much checking can be done
        subtype:  strict_subtype (type,type)  the '>' link in the FT notation
           subtype:  properly_subsumes_leaf__PSBL (type,type)  the 2nd type is a leaf type properly subsumed by the 1st type
        subtype:  subsumes_leaf__SBL (type,type)  the 2nd type is a leaf type subsumed by the 1st type
           subtype:  properly_subsumes_leaf__PSBL (type,type)  the 2nd type is a leaf type properly subsumed by the 1st type
  subtype:  supertype (type,type)  in the FT notation, the '<' link is only used to connect to a "strict" supertype
     subtype:  sub_class_of__subclassof__super_class__superclas (class,class)  in WebKB, use the link '<'
     subtype:  subrelation (relation_type,relation_type)  if the common reading conventions of parameters had been respected, this type would have been named subclass_of; every tuple of the 1st argument (r1) is also a tuple of the 2nd argument (r2), i.e. if r1 holds for some arguments arg_1, arg_2, ... arg_n, then the r2 holds for the same arguments; a consequence of this is that a relation and its subrelations must have the same valence
        subtype:  sub_property_of (binary_relation_type,binary_relation_type)  in WebKB, use the link '<'
  subtype:  same_type_as (type,type)
     subtype:  equivalent_class (class,class)  in WebKB, use the link '='
     subtype:  equivalent_property (binary_relation_type,binary_relation_type)  in WebKB, use the link '='
  subtype:  exclusive_type__exclusivetype (type,type)  in WebKB, use the '!' link
     subtype:  exclusive_class__exclusiveclas (class,class)  the 2 classes have no common subtype/instance; in WebKB, use the link '!'
        subtype:  complement_class (class -> class)  if something is not in one of the classes, then it is in the other, and vice versa; in WebKB, use the link '/'
     subtype:  closed_exclusion (type -> type)  the '/' link in the FT notation:  the two linked types either are respectively identical to pm#thing and pm#nothing (they are "complement types") or they subtype a same type and form a complete subtype partition
        subtype:  complement_type (type -> type)  a supertype of owl#complement_of which can only connect RDFS/OWL classes
           subtype:  complement_class (class -> class)  if something is not in one of the classes, then it is in the other, and vice versa; in WebKB, use the link '/'
  subtype:  relation_from_relation_type (relation_type,*)
     subtype:  relation_from_binary_relation_type (binary_relation_type,*)
        subtype:  relation_to_another_binary_relation_type (binary_relation_type,binary_relation_type)
           subtype:  equivalent_property (binary_relation_type,binary_relation_type)  in WebKB, use the link '='
           subtype:  sub_property_of (binary_relation_type,binary_relation_type)  in WebKB, use the link '<'
           subtype:  inverse__reverse (binary_relation_type -> binary_relation_type)  for inverseOf(R,S) read: R is the inverse of S; i.e. if R(x,y) then S(y,x) and vice versa; in WebKB, use the link '-'
        subtype:  domain (binary_relation_type,class)
        subtype:  range (binary_relation_type,class)
     subtype:  domain (relation_type,positive_integer,set_or_class)  the formula (sumo#domain ?REL ?INT ?CLASS) means that the ?INT'th element of each tuple in the relation ?REL must be an instance of ?CLASS
     subtype:  domain_subclass (relation_type,positive_integer,set_or_class)  the formula (sumo#domainSubclass ?REL ?INT ?CLASS) means that the ?INT'th element of each tuple in the relation ?REL must be a subclass of ?CLASS
     subtype:  range (function_type,set_or_class)  gives the range of a function, i.e. all of the values assigned by the function are instances of sumo#class
     subtype:  range_subclass (function_type,set_or_class)  all of the values assigned by the function in the 1st argument are subclasses of the 2nd argment
     subtype:  valence (relation_type,positive_integer)  specifies the number of arguments that a relation can take; if a relation does not have a fixed number of arguments, it does not have a valence and it is an instance of variable_arity_relation, e.g., sumo#holds is a variable_arity_relation
     subtype:  disjoint_relation (relation_type+)  (sumo#disjointRelation @ROW) means that any two relations in @ROW have no tuples in common; as a consequence, the intersection of all of the relations in @ROW is the null set
     subtype:  holds__hold (relation_type,*)  (holds P N1 ... NK) is true when the tuple of objects denoted by N1,..., NK is an element of the relation P
     subtype:  assignment_fn (function_type,*)  if F is a function with a value for the objects denoted by N1,..., NK, then (sumo#assignmentFn F N1 ... NK) is the value of applying F to the objects denoted by N1,..., NK; otherwise, the value is undefined
     subtype:  distributes__distribute (binary_function_type,binary_function_type)  a binary_function ?F1 is distributive over another binary_function ?F2 just in case (?F1 ?INST1 (?F2 ?INST2 ?INST3)) is equal to (?F2 (?F1 ?INST1 ?INST2) (?F1 ?INST1 ?INST3)), for all ?INST1, ?INST2, and ?INST3
  subtype:  relation_from_class (class,*)
     subtype:  relation_from_class_to_collection (class,collection)
        subtype:  union_of__unionof (class,list)  for unionOf(X,L) read: X is the union of the classes in the list L; i.e. if something is in any of the classes in L, it is in X, and vice versa
           subtype:  disjoint_union_of (class,list)  for disjointUnionOf(X,L) read: X is the disjoint union of the classes in the list L: (a) for any c1 and c2 in L, disjointWith(c1,c2), and (b) i.e. if something is in any of the classes in L, it is in X, and vice versa
        subtype:  intersection_of (class,list)  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
        subtype:  one_of__oneof (class,list)  for oneOf(C,L) read everything in C is one of the things in L
        subtype:  distinct_members (all_different,list)
        subtype:  relation_to_another_class (class,class+)
           subtype:  sub_class_of__subclassof__super_class__superclas (class,class)  in WebKB, use the link '<'
           subtype:  equivalent_class (class,class)  in WebKB, use the link '='
           subtype:  exclusive_class__exclusiveclas (class,class)  the 2 classes have no common subtype/instance; in WebKB, use the link '!'
           subtype:  restricted_by (class,restriction)
           subtype:  disjoint_decomposition (class,class+)  a disjoint_decomposition of a class C is a set of mutually disjoint subclasses of C
              subtype:  partition (class,class+)  a partition of a class C is a set of mutually disjoint classes (a subclass partition) covering C; each instance of C is instance of exactly one of the subclasses in the partition
           subtype:  exhaustive_decomposition (class,class+)  an exhaustive_decomposition 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 sumo#partition - a partition is a disjoint exhaustive decomposition)
              subtype:  partition (class,class+)  a partition of a class C is a set of mutually disjoint classes (a subclass partition) covering C; each instance of C is instance of exactly one of the subclasses in the partition
     subtype:  abstraction_fn__abstractionfn (class -> Attribute)  a unary_function that maps a class into an attribute that specifies the condition(s) for membership in the class
     subtype:  relation_from_sumo_process_class (sumo_process_class,*)
        subtype:  causes_subclass (sumo_process_class,sumo_process_class)  the 1st argument brings about the 2nd, e.g., (causes_subclass killing death)
        subtype:  capability (sumo_process_class,case_relation_type,object)  the object  has the ability to play the role (case relation) in the given kinds of processes
        subtype:  has_skill__hasskill (sumo_process_class,agentive_physical_object)  similar to the capability predicate with the additional restriction that the ability be practised or demonstrated to some measurable degree
     subtype:  relation_from_attribute_type (attribute_class,*)
        subtype:  contrary_attribute (attribute_class,attribute_class+)  set of attributes such that something can not simultaneously have more than one of these attributes, e.g., in KIF, (sumo#contrary_aAttribute sumo#pliable sumo#rigid) means that nothing can be both pliable and rigid
        subtype:  exhaustive_attribute (attribute_class,attribute_class+)  this predicate relates a class to several types of attributes, and it means that the elements of this set exhaust the instances of the class; for example, in KIF, (sumo#exhaustiveAttribute sumo#physicalState sumo#solid sumo#fluid sumo#liquid sumo#gas) means that there are only three instances of the class sumo#physicalState, viz. sumo#solid, sumo#fluid, sumo#liquid, and sumo#gas
     subtype:  relation_from_restriction (restriction,*)
        subtype:  on_property (restriction,binary_relation_type)  for onProperty(?restrClass,?rel), read: ?restrClass is a restricted with respect to property ?rel
        subtype:  all_values_from (restriction,class)  for onProperty(?restrClass,?rel) and toClass(?restrClass,C), read: i instance of ?restrClass if and only if for all j, ?rel(i,j) implies type(j,C)
        subtype:  has_value__hasvalue (restriction,?)  for onProperty(?restrClass,?rel) and hasValue(?restrClass,V), read: i instance of ?restrClass if and only if ?rel(i,V), i.e. if and only if any ?rel from ?i has for destination an instance of C; toValue is an obsolete name
        subtype:  some_values_from (restriction,class)  for onProperty(?restrClass,?rel) and some_values_from(?restrClass,C), read: i instance of ?restrClass if and only if for some j, ?rel(i,j) and type(j,C), i.e. if and only if i has at least one ?rel which has for destination an instance of C
        subtype:  has_class_q__hasclassq (restriction,class)  property for specifying class restriction with cardinalityQ constraints
        subtype:  cardinality (restriction -> nonnegative_integer)  for onProperty(?restrClass,?rel) and cardinality(?restrClass,n), read: i instance of ?restrClass if and only if there are exactly n distinct j with ?rel(i,j)
        subtype:  cardinality_q__cardinalityq (restriction -> nonnegative_integer)  for onProperty(?restrClass,?rel), cardinalityQ(?restrClass,n) and hasClassQ(?restrClass,C), read: i instance of ?restrClass if and only if there are exactly n distinct j with ?rel(i,j) and type(j,C)
        subtype:  min_cardinality__mincardinality (restriction -> nonnegative_integer)  for onProperty(?restrClass,?rel) and minCardinality(?restrClass,n), read: i instance of ?restrClass if and only if there are at least n distinct j with ?rel(i,j)
        subtype:  min_cardinality_q__mincardinalityq (restriction -> nonnegative_integer)  for onProperty(?restrClass,?rel), minCardinalityQ(?restrClass,n) and hasClassQ(?restrClass,C), read: i instance of ?restrClass if and only if there are at least n distinct j with ?rel(i,j)
        subtype:  max_cardinality__maxcardinality (restriction -> nonnegative_integer)  for onProperty(?restrClass,?rel) and maxCardinality(?restrClass,n), read: i instance of ?restrClass if and only if there are at most n distinct j with ?rel(i,j)
        subtype:  max_cardinality_q__maxcardinalityq (restriction,nonnegative_integer)  for onProperty(?restrClass,?rel), maxCardinalityQ(?restrClass,n) and hasClassQ(?restrClass,C), read: i instance of ?restrClass if and only if there are at most n distinct j with ?rel(i,j) and type(j,C)
     subtype:  wnObject (class,?)
     subtype:  wnNounType (class,?)
  subtype:  relation_from_type_to_collection (type,collection)
     subtype:  partition (type,collection)
     subtype:  instances__instance (type -> collection)
     subtype:  subtypes (type -> collection)
     subtype:  relation_from_class_to_collection (class,collection)
  subtype:  material__material_type_of (substance_class,corpuscular_object)  all other mereological relations are defined in terms of this one; it means that the 2nd argument is structurally made up in part of the 1st argument; this relation encompasses the concepts of 'composed of', 'made of', and 'formed of'; for example, plastic is a material of my computer monitor; since part is a reflexive_relation, every object is a part of itself