What would you like to be added:

To rename data filter properties

Why is this needed:

Having properties such as stateDataFilter when defining a state, or actionDataFilter when defining an action is redudant and tedious to write. So, instead of:

...
states:
- name: MyOperationState
  type: operation
  stateDataFilter: ...
  actions:
    - name: MyAction
      actionDataFilter: ...
      ...
...

... I propose we use:

...
states:
- name: MyOperationState
  type: operation
  dataFilter: ...
  actions:
    - name: MyAction
      dataFilter: ...
      ...
...

IMHO it's less confusing, shorter and cleaner.