Entity Relationship

An entity-relationship diagram of the ontology itself — the one diagram whose source is the schema rather than the data. Classes render as entities: a header carrying the class's display label and one row per datatype property, showing the property and its range. Object properties render as relationship lines from the class in their domain to the class in their range, labelled with the property's display label, with cardinality markers derived from the constraints in the closure — sh.minCount / sh.maxCount on a targeting shape, or owl.FunctionalProperty for at-most-one — and drawn undirected when the property is owl.SymmetricProperty. Nothing is authored that the ontology does not already say. On a Package page the scope is every class the package declares. On a Class page it is that class and the classes its object properties reach — reached through a look on rdfs.Class or an ancestor, since a class's own derivation.look describes how its instances render, not its own page.