level.dat History

• inf-20100327
  • Introduced level.dat
• inf-20100413-1953
  • Removed id tag under the Player compound tag
  • Reordered some keys
• inf-20100625-1917
  • Added boolean byte tag onGround under Player
    • Used to tell if the player is on a block
  • Reordered some keys
• a1.0.4
  • Added boolean byte tag SnowCovered
    • Used to determine if new chunks should be covered in snow or not
  • Normalized the values inside the Motion tag (unverified)

    • - Motion: [0d, -0.08d, 0d]
      + Motion: [0d, -0.0784000015258789d, 0d]

• a1.2.0
  • Added int tag Dimension under Player
    • Stores the dimension (by id) the player was in when saved
• b1.3-1713
  • Added boolean byte tag Sleeping under Player
    • Used to determine if the player should be sleeping on join
  • Added short tag SleepTimer under Player
    • Stores the amount of ticks the player has been sleeping for
  • Added string tag LevelName
    • Stores the name of the world
  • Added int tag version
    • Stores the version of Minecraft the world was last loaded in
    • The value of this tag was never changed from 19132 until version was replaced by DataVersion
• b1.5
  • Added int tag rainTime
    • Stores the amount of ticks until it will rain in the world.
    • Once this hits 0, raining will be set to true/1 and this value will be assigned a new random number.
  • Added int tag thunderTime
    • Stores the amount of ticks until a thunderstorm will start in the world.
    • Once this hits 0, thundering will be set to true/1 and this value will be assigned a new random number.
  • Added boolean byte tag raining
    • Determines whether it was raining when the world was saved
  • Added boolean byte tag thundering
    • Determines whether there was a thunderstorm when the world was saved
  • Moved LastPlayed tag from top of Data to below version
  • Moved LevelName tag below LastPlayed
• b1.6-test_build_3
  • Pos' Y tag now stores pos.y + 2 to prevent the player from spawning into the world inside a block (unverified)

    • - Pos: [0d, 94.6200000047684d, 0d]
      + Pos: [0d, 96.2400000095367d, 0d]

• b1.6.5
  • Reverted Pos' Y tag fix

    • - Pos: [0d, 96.2400000095367d, 0d]
      + Pos: [0d, 94.6200000047684d, 0d]

• b1.8-pre1-081459
  • Added float tag foodSaturationLevel under Player
    • Default value is 5f
  • Added int tag XpLevel under Player
    • Default value is 0
  • Added int tag Xp under Player
    • Default value is 0
  • Added int tag XpTotal under Player
    • Default value is 0
  • Added int tag foodLevel under Player
    • Default value is 20
  • Added float tag foodExhaustionLevel under Player
    • Default value is 0f
  • Added int tag foodTickTimer under Player
    • Default value is 0
  • Added int tag GameType
    • Determines the Gamemode (by id) that players will use
    • Default value is 0

    • {
        {0, "survival"}, // survival mode
        {1, "creative"}  // creative mode
      }

  • Added boolean byte tag MapFeatures
    • Default value is true/1 on a new world, otherwise false/0 for upgraded worlds (unverified)
    • Determines whether to generate features such as strongholds and villages
• b1.9-pre2
  • Added boolean byte tag hardcore
    • Determines whether players are in "hardcore" mode, which prevents the player from playing the world after they have died.
• b1.9-pre4-1415
  • Removed int tag Xp in favor of new float tag XpP
    • Default value of XpP is 0f
• b1.9-pre5
  • Added compound tag abilities under Player
    • This tag contains 4 new tags:
      • boolean byte tag invulnerable
      • boolean byte tag mayfly
      • boolean byte tag instabuild
      • boolean byte tag flying