Processes, interactions and lifecycle
Gane–Sarson-style DFD
The Gane–Sarson DFD variant: rounded process boxes, parallel-line stores, and the same discipline of named data flows.
dfd.gane_sarson@1New DDN source
Why use it?
Some organisations standardised on Gane–Sarson; the variant exists so the document reads natively to them.
When it helps
DFD work in Gane–Sarson shops.
How to read it
- Same rules as Yourdon — only the silhouettes differ.
- Stores are the parallel lines; everything else maps one to one.
What you need
- The same content as any DFD
- The idiom the audience reads
Things to check
- Do not mix Yourdon and Gane–Sarson symbols in one diagram.
- Do not read the variant as a different model.
Scope of this diagram
The Gane–Sarson idiom as notation; the same underlying model as any DFD.
Work with the converted example
- Open the viewer and select
dfd_gane. Inspect the rendered view and its source. - Open the designer. Keep the selected profile and inspect its legal palette and property controls.
- Change one displayed title or an appropriate data value. Apply the edit and check the resulting diagram.
- Run the verifier and review its diagnostics before moving complete content into review.
- Download your edited DDN source to retain the change.
The example uses the indentation-based ddn-next-1 dialect. The language guide explains reusable definitions, dotted data rows and explicit property blocks.