# Changelog

## Version 3.4
- Clarify that entry lengths must be > 0.
- Add details about ordering of leaf directories.

## Version 3.3
- Narrow `clustered` meaning: first tile entry must be offset 0.
- Add language discouraging the creation of nested leaf directories.
- add recommended MIME Type.

## Version 3.2
- Detailed rewrite of spec by @DerZade to clarify ambiguity.

## Version 3.1
- added `metadata` details about `vector_layers`.
- Clarified that directory entry lengths must be nonzero, and directories must be non-empty.
- add AVIF to TileTypes.