What modeling languages and notations do you know besides BPMN and UML?

In addition to BPMN and UML, there are other modeling languages and notations used in various fields:

• ER Diagrams (Entity-Relationship) — for modeling data and their relationships in databases.
• DSL (Domain-Specific Languages) — specialized modeling languages for specific subject areas.
• Archimate — for architectural modeling of enterprise systems.
• DFD (Data Flow Diagrams) — for depicting data flows and processes within a system.
• SysML (Systems Modeling Language) — an extension of UML for systems engineering.
• Petri Nets — for modeling processes with parallelism and synchronization.
• IDEF (Integration DEFinition) — a family of methods for modeling business processes and systems.

Each notation is suitable for specific tasks: for example, ER diagrams are convenient for designing databases, while Archimate is used for describing enterprise architecture.