Java Edition 1.13/Flattening

The current contents of this page serve as a comparison between the identifiers of versions 1.12 and 1.13.

Blocks
Changes for blocks noted with CU are still uncertain. Names for blocks noted with NU are still uncertain.

Items
Changes for items noted with CU are still uncertain. Names for items noted with NU are still uncertain.

Block states
Changes for blocks noted with CU are still uncertain.

NBT Data
WIP