msa.md

        /---------+
        |Model    |
        |         |
        |         |
        +---------+
           ^  ^
  spec for |  | manipulate
+----=-----+  +----=-----+
|                        |
|                        |

/---------+ /---------+ trigger /---------
|Spec | use |Action |<-----------|User | | |<-----=------| | | | | | | |----------->| | +---------+ +---------+ response ---------/ | | | | +----=-----+ +----=-----+ spec for | | manipulate v v /---------+ |Data | $ pmk [spec] -x action | {s}| | | +---------+