SysML 1.y Support

[gollum18]

I'd like to request that support for SysML be added at some point. SysML is a subset of UML with it's own additions and is considered the industry standard for Systems Engineering Modelling. See the official documentation for SysML here.

The most common tool for SysML development is Gaphor, a cross-platform SysML specific UML editor. While it works well, it only offers a standalone executable on Windows. Platforms such as MacOS and Linux must install additional dependencies with the software. The software integrates tightly with GTK and is not cross desktop environment on Linux without installing GTK dependencies and libraries.

Supporting SysML 1.y only requires implementing:

• Requirement Diagrams (derived from class diagrams)
• Parametric Diagrams (derived from composite structure diagrams)
• Allocation Tables (allows for mapping across diagrams)

While the first two requirements listed, requirement and parametric diagrams, could technically be built using existing components within umlet, explicit support for them would be required for Allocation Table support. Allocation Tables would require the ability to link Requirements across diagrams to allow for requirement tracing.