> For the complete documentation index, see [llms.txt](https://zefyr-editor.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zefyr-editor.gitbook.io/docs/v0.7.0/concepts.md).

# Concepts

- [Data Format and Document Model](https://zefyr-editor.gitbook.io/docs/v0.7.0/concepts/data-and-document.md)
- [Attributes](https://zefyr-editor.gitbook.io/docs/v0.7.0/concepts/attributes.md)
- [Heuristic rules](https://zefyr-editor.gitbook.io/docs/v0.7.0/concepts/heuristics.md)