Notation

Ontologies

An ontology is a set of precise descriptive statements about some part of the world (usually referred to as the domain of interest or the subject matter of the ontology). Precise descriptions satisfy several purposes: most notably, they prevent misunderstandings in human communication and they ensure that software behaves in a uniform, predictable way and works well with other software. What is OWL 2 OWL 2 Primer

Ontology Seed Diagram

New Diagram

On the "Diagrams" screen, click the "New Diagram" button and the "New Diagram" form will appear.

Existing Diagram

Select the ontology seed diagram from the list.

Classes

In OWLGrEd notation, classes are represented by yellow nodes with the name of the class at the top.

Class Hierarchies

Subclass Of – generalization notation

Subclass Of – horizontal fork notation

Subclass Of – text notation

Individuals

In OWLGrEd notation, individuals are represented by purple nodes.

Instance Of

Instance Of – line notation

Instance Of – text notation

Object Properties

Object Property Association notation

Object Property Node notation

Object Property Assertion line notation

Object Property Assertion node notation

Data Properties

Data Properties text notation

Data Property node notation

Data Property Assertion text notation

Data Property Assertion node notation