Color = Application Group
Chemical
Control
Core / General
Hydrogen
Metal
Other
Other Elec. Generators
Renewables

Shape = Model Category
⬢Control
●Converter
◯Core
★Finance
●Other
■Reliability
▲Resource
◆Storage
■Transporter

Border width = inheritance depth
(thicker = higher-level parent)

Arrows: parent → child
Scroll to zoom | Drag to pan

H2Integrate Class Hierarchy
Interactive visualization — zoom, pan, hover for details