Classification of UML metaclasses by diagram type and by
metaclass category, plus the enumeration value sets, aligned to the UML 2.5.1
specification structure.
UML 2.5.1 Concept Scheme
▼By Diagram Type
Classification of UML elements by the diagram types they appear in.
https://meta.linked.archi/uml/tax#ByDiagramType
▼Structural Diagrams
UML diagrams that show the static structure of the system.
Classification of the values of UML Enumerations — visibility,
aggregation, parameter direction, message sort and kind, pseudostate kind, transition
kind, interaction operator and connector kind.