# Architecture principles whose scope is lifetime

> 2 records

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

## Entries

- [Singleton Pattern](https://banes-lab.com/records/architecture/singleton-pattern.md): A design pattern that restricts a class to one instance, reached through a global access point.
- [Independent Lifetime Axes](https://banes-lab.com/records/architecture/independent-lifetime-axes.md): A design rule that a surface's lifetime is declared on three independent axes, retention, mutability and removal authority, each taking a value from a closed set, so no single word stands for all three.