**Similar, but different modeling systems.** # SysML vs UML SysML is heavily based on UML, but it's smaller. It's not a strict subset, as there's native SysML diagrams that do not exist in UML. Requirements DIagram Does not exist in UML at all Structure Diagrams Package Diagram (same) Block Definition Diagram (modified) Internal Block Diagram (modified) Parametric Diagram (SysML only) Behavior Diagrams Sequence Diagram (same) State Machine Diagram (same) Use Case Diagram (same) Activity Diagram (modified) **** ## Source ## Related - [[SysML]] - [[UML]]