19w40a — release journal
What 19w40a changed for data packs, measured against 19w39a, the build before it. Released 2019-10-02; development build — not a release.
💡 No measured change
Same data pack format, same registries. That is the strongest safe-for-data-packs signal a diff can give, and it is still not proof — behaviour changes and bug fixes are invisible to it.
Formats
| 19w39a | 19w40a | |
|---|---|---|
| Data pack format | 4.0 | 4.0 |
| Resource pack format | 4.0 | 4.0 |
| Data version | 2207 | 2208 |
Registries
No registry gained, lost or changed an entry.
The official notes
Read the 19w40a article on minecraft.net.
The article has no technical-changes section — it lists bug fixes only, or predates that heading.
Minecraft Wiki page for 19w40a.
In the journal
← 19w39a · All builds · 19w41a →
Sources
- misode/mcmeta — 19w40a summary — formats and registries, generated from the game’s own data.
- minecraft.net — 19w40a — section names only.