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
Blocks that change their id in any way will also affect their statistics.

Items
Changes for items noted with CU are still uncertain.

Names for items noted with NU are still uncertain.

Items that change their id in any way will also affect their statistics.

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

NBT Data
Changes for nbt noted with CU are still uncertain.

Tags noted with BD will change to a compound format with .
 * Items


 * in the root of the item data removed.
 * added in the  tag, only used for durability.
 * ,  or similar added in the   tag, for maps.Unknown formatting.
 * instead of  used by Banners to determine the base color of the banner.


 * Entities


 * and  of Endermen changed to 1  BD tag as metadata is removed and replaced with block states.
 * of Projectiles changed to BD as metadata is replaced with block states.
 * of Projectiles changed to . CU
 * of Arrows removed as metadata is removed and replaced with block states.
 * and  of Minecarts changed to 1  BD as metadata is removed and replaced with block states.
 * of Minecarts changed to . CU
 * and  of Falling Blocks changed to 1  BD as metadata is removed and replaced with block states.
 * and   from Area Effect Clouds replaced with  BD and  .CU


 * Blocks


 * from Comparators removed. CU
 * Flower Pot Block Entity removed.
 * Note Block Block Entity removed.
 * Bed Block Entity removed.CU
 * and  of Piston Extensions changed to 1  BD as metadata is removed and replaced with block states.
 * of Piston Extensions changed to . CU
 * from Skulls removed.
 * Skull Block Entity removed for all but  and.
 * Skull Block Entity renamed to . CU

Commands
Changes for commands noted with CU are still uncertain.


 * argument removed.
 * argument no longer allows metadata.
 * argument no longer allows metadata.
 * and  arguments no longer allows metadata.
 * argument removed.
 * argument removed.
 * argument no longer allows metadata.
 * arguments changed to  and.

Advancements

 * 's  removed.
 * condition's  removed.

Loot Tables

 * function removed.