# Architecture principles whose scope is metadata

> 3 records

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

## Entries

- [Self-Describing Structures](https://banes-lab.com/records/architecture/self-describing-structures.md): A design rule that a data structure carries its own type tags and field names, so a reader can interpret it without outside knowledge.
- [Reflection](https://banes-lab.com/records/architecture/reflection.md): A mechanism that lets a program read and act on type metadata about its own structure at runtime.
- [Introspection](https://banes-lab.com/records/architecture/introspection.md): A mechanism that lets a program query an object's type and public members at runtime without changing them.