> For the complete documentation index, see [llms.txt](https://www.information-architecture.world/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.information-architecture.world/what-is-ia/theory.md).

# Theory

- [Theoretical foundations of IA](https://www.information-architecture.world/what-is-ia/theory/theoretical-foundations-of-ia.md)