Books / Law as Code in Practice: German Housing Benefit (Wohngeld) / Appendix F
Appendix F
Where Catala Stands
Contents of Law as Code in Practice: German Housing Benefit (Wohngeld)
Most chapters close with a short section on how Catala — and, in Chapter 7, GETTSIM — meets the same need. Those sections describe the other tools as their own documentation presents them. They were checked against Catala 1.3.0 (released 1 October 2026) and the Catala book on 11 October 2026; the date is printed here once instead of under every section.
Tools change. If something has changed, tell us at hi@arxo.io. Corrections are published with the next edition and listed under Corrections.
| Chapter | What the chapter compares |
|---|---|
| 1 | dates and pinned publications |
| 3 | exact arithmetic of the formula |
| 4 | rounding and intermediate values |
| 5 | tests and expected statuses |
| 6 | a question left to the authority |
| 7 | exceptions and inputs decided elsewhere |
| 8 | missing facts and contradictory records |
| 9 | traces, fingerprints and replay |
| Final exercise | statute as code — the idea this book builds on |