The «Subsystem» stereotype for UML Components has nothing to do with the non-normative SysML «subsystem» stereotype for Blocks
GOTCHA: UML Component «subsystem» vs non-normative SysML «subsystem» Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 14:01: UseCases in SysML Slide kind hybrid diagram UML Profile Diagram
