"radial" is the language used by flon. At some point it could simply get renamed "flon". Not sure yet.
For now, I could say that radial/core instructions are what make up the "plain" language, while flon instructions (like "concurrence", "task") are what make up the "flon" language, where flon is the workflow engine.
TODO
TODO
TODO
It sequences two sub-expressions, doesn't touch the f.ret
.
sequence
task a
task b
TODO