Simple OML Diagram

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The elements of the Classification Projection Diagram are illustrated in the following simplified diagram.

An elaboration of this classification projection diagram, as depicted below, illustrates the core concepts in the OML model. This model renders more explicitly the connections found in the OML Grammar. As a rule of thumb, XML elements become entity types in the OML model, and attributes and content nonterminals (child embeddings) of XML elements become functions and binary relations in the OML model. A type is depicted by a rectangle and an entity is depicted by a large dot. The elements that are colored black are elements of Simple OML. They largely correspond to the RDF/Schema model. Although they are specified in the Simple OML Ontology, the generic classification and subtype hierarchies have not been included as types (rectangles), since their instances are not needed until CKML is specified. When more than one subrectangle (subtype) is present, the subtypes partition the supertype.

 

 

Binary Relations

classification : Instance  ® Type

classification.BinaryRelation : Instance.BinaryRelation  ® Type.BinaryRelation

classification.Entity : Instance.Entity  ® Type.Entity

classification.Object : Instance.Object  ® Type.Object

subtype : Type  ®  Type

subtype.BinaryRelation : Type.BinaryRelation  ®  Type.BinaryRelation

subtype.Entity : Type. Entity  ®  Type. Entity

comment : Thing   ®  String

Functions

source.Type : Type.BinaryRelation  ® Type.Entity

target.Type : Type.BinaryRelation  ® Type.Entity

source.Instance : Instance.BinaryRelation  ® Instance.Entity

target.Instance : Instance.BinaryRelation  ® Instance.Entity

name : Type  ®  String

id : Instance  ®  String

 

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