Java Edition data values

Data Values are digits assigned to every object in Minecraft.

Blocks
These can also be called "Block IDs." (Bold entries are not available without hacking in Alpha and italics entries are not available in Classic)

Items
Items are prefixed by hex 0x01 instead of 0x00 in the save file.

Data
Meta data. Each value here precedes a single hex digit used for lighting.

{| align="left" style="margin:2px; border: 1px solid silver; text-align: center;" ! Block !! dec !! hex !! Use
 * Water / Lava || 0-F || 0-F || Determines water level. 0 is a full block.  Water goes up to 7, Lava can only go up to 3.  If bit 0x8 is set, this liquid is "falling" and only spreads downward.
 * Farmland || 0-15 || 0-F || Determines wetness value
 * Crops || 0-7 || 0-7 || Determines crop size
 * Torch/Gear || 0-3 || 0-3 || Determines torch direction
 * Redstone || 0-15 || 0-F || Determines current strength
 * Rails || 0-15 || 0-F || Determines rail slope and orientation.
 * Torch/Gear || 0-3 || 0-3 || Determines torch direction
 * Redstone || 0-15 || 0-F || Determines current strength
 * Rails || 0-15 || 0-F || Determines rail slope and orientation.
 * Redstone || 0-15 || 0-F || Determines current strength
 * Rails || 0-15 || 0-F || Determines rail slope and orientation.
 * Rails || 0-15 || 0-F || Determines rail slope and orientation.