The SOX system design designer module provides extensive modeling capabilities based on SysML 1.6 and UML 2.5 standards. Model your system using all kind of SysML/UML diagram and link requirements from the SOX requirements management module (RM) to system design elements.
...
The SOX system design module integrates RCP Papyrus, a GUI-based tool suite suitable for editing UML 2 (and 2.x), as well as SysML 1.1, 1.4 and 1.6. SysML is a Papyrus DSML (Directory Service Markup Language) that implements the SysML standard as defined by OMG.