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SIE.9:3 - Forces
| Force | Tension |
|---|
| Minimality | A small interface is easier to use and maintain, while hiding source, loss, or failure makes it unsafe. |
| Human and machine use | Machines need stable schemas and branch codes; people need interpretations and challenge paths. |
| Abstraction | Receiver-friendly names reduce burden, while source identifiers and exact meanings must remain recoverable. |
| Performance | Rich provenance and alternative claims cost bandwidth and attention, while omitted trace defeats challenge and validation. |
| Security | The receiver needs enough source information to rely, while disclosure can violate provider, privacy, or protection conditions. |
| Evolution | Stable interface promises aid use, while source or mapping changes must not be hidden behind unchanged field names. |