# Architecture principles whose scope is event

> 6 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/event

## Entries

- [Causality](https://banes-lab.com/records/architecture/causality.md): A design rule that every effect records the event that caused it, so its order can be reasoned about.
- [Causal Dependency](https://banes-lab.com/records/architecture/causal-dependency.md): A conceptual representation of one step or event that cannot proceed until another has happened.
- [Hybrid Logical Clocks](https://banes-lab.com/records/architecture/hybrid-logical-clocks.md): A mechanism that combines physical time with a logical counter, so timestamps follow causal order and stay close to wall-clock time.
- [Total-Order Broadcast](https://banes-lab.com/records/architecture/total-order-broadcast.md): A mechanism that delivers every message to every node in the same order, agreed by consensus.
- [Choreography](https://banes-lab.com/records/architecture/choreography.md): A mechanism that coordinates a cross-service flow through events, with each service reacting to the previous one's event.
- [Causation ID](https://banes-lab.com/records/architecture/causation-id.md): A mechanism that stamps each event with the identifier of the event that caused it.