Cut & Shave
summary
A domain model for a hot‑air balloon operator gets pared back to reduce accidental complexity: invoices, invoice lines, time and space and team‑spirit are reclassified to avoid category mistakes, yielding clearer boundaries and fewer entities. Reservations are implemented with event sourcing so "flight planned / canceled" becomes the source of truth; the system is split into three models and ends up deployed in five implementations with the customer-facing behavior unchanged. The key tool is disciplined use of natural language inside bounded contexts.
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chapters (14)
- 0:00Introduction and inspiration
- 3:16Language and domain modeling
- 7:17Linguistic relativity explained
- 15:29Philosophy of domains and categories
- 20:32Memory and interpretation in models
- 23:00Category mistakes in software
- 27:14Context boundaries in domain design
- 30:00Programming languages as models
- 34:03Language limits and software complexity
- 36:15Expanding domain language
- 39:12Customer communication with models
- 40:59Natural language in modeling
- 42:31Summary and final thoughts
- 44:23Q&A session
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