Abstract Knowledge Graph

Description	The Abstract Knowledge Graph defines the top level constructs of Entitys and Relations which have no spatiotemporal extension and do not participate in composite structures.. Most "data models" function as Abstract Knowledge Graphs, offering limited semantic expressivity. In SysFEAT, Abstract Knowledge Graphs are used to define all syntactic constructs required for model management, including Packaging and Annotation (see Annotation Block). Full semantic capabilities are provided by 4D Composite Knowledge Graphs.
Dictionary	SysFEAT Upper Ontology
Parent Domain	Upper Ontology
Domain dependencies	Reflexive Knowledge Graph

Concept	Description
Abstract Entity	An Abstract Entity is a First Order Entity that does not represent a spatio-temporal extent, unlike Individuals, One specific use case is the definition of syntactic entities, such as in packaging and annotation. Another use case is to provide first-level support for terminology concepts, such as vocabulary and designation, without delving into changes in vocabulary over time. References: WordNet - Abstract Entity
Abstract Entity MetaClass	Abstract Entity MetaClass is the powertype of Class of Abstract Entity. References: WordNet - Abstract Entity
Class of Abstract Entity	Class of Abstract Entity is the powertype of Abstract Entity. In other words, Abstract Entity is the base type, while Class of Abstract Entity is the type whose instances are subtypes of that base type. Example of instance of : Class of Abstract Entity . Term References: WordNet - Abstract Entity