IDEF0’s ancestor had data diagrams, too.
SADT has Activity diagrams, which are essentially exactly what IDEF0 is, but also Data Modeling diagrams, which look similar but have slightly different semantics.
The semantics of arrows for data:
- Inputs are activities that produce the data.
- Outputs consume the data.
- Controls influence the internal state of the data.
They are basically just IDEF0 diagrams where the arrows are data.