Spell.dbc/Attributes

enum SpellAttr0

   SPELL_ATTR0_UNK0                             = 0x00000001, //  0
   SPELL_ATTR0_REQ_AMMO                         = 0x00000002, //  1 on next ranged
   SPELL_ATTR0_ON_NEXT_SWING                    = 0x00000004, //  2
   SPELL_ATTR0_IS_REPLENISHMENT                 = 0x00000008, //  3 not set in 3.0.3
   SPELL_ATTR0_ABILITY                          = 0x00000010, //  4 client puts 'ability' instead of 'spell' in game strings for these spells
   SPELL_ATTR0_TRADESPELL                       = 0x00000020, //  5 trade spells (recipes), will be added by client to a sublist of profession spell
   SPELL_ATTR0_PASSIVE                          = 0x00000040, //  6 Passive spell
   SPELL_ATTR0_HIDDEN_CLIENTSIDE                = 0x00000080, //  7 Spells with this attribute are not visible in spellbook or aura bar
   SPELL_ATTR0_HIDE_IN_COMBAT_LOG               = 0x00000100, //  8 This attribite controls whether spell appears in combat logs
   SPELL_ATTR0_TARGET_MAINHAND_ITEM             = 0x00000200, //  9 Client automatically selects item from mainhand slot as a cast target
   SPELL_ATTR0_ON_NEXT_SWING_2                  = 0x00000400, // 10
   SPELL_ATTR0_UNK11                            = 0x00000800, // 11
   SPELL_ATTR0_DAYTIME_ONLY                     = 0x00001000, // 12 only useable at daytime, not set in 2.4.2
   SPELL_ATTR0_NIGHT_ONLY                       = 0x00002000, // 13 only useable at night, not set in 2.4.2
   SPELL_ATTR0_INDOORS_ONLY                     = 0x00004000, // 14 only useable indoors, not set in 2.4.2
   SPELL_ATTR0_OUTDOORS_ONLY                    = 0x00008000, // 15 Only useable outdoors.
   SPELL_ATTR0_NOT_SHAPESHIFT                   = 0x00010000, // 16 Not while shapeshifted
   SPELL_ATTR0_ONLY_STEALTHED                   = 0x00020000, // 17 Must be in stealth
   SPELL_ATTR0_DONT_AFFECT_SHEATH_STATE         = 0x00040000, // 18 client won't hide unit weapons in sheath on cast/channel
   SPELL_ATTR0_LEVEL_DAMAGE_CALCULATION         = 0x00080000, // 19 spelldamage depends on caster level
   SPELL_ATTR0_STOP_ATTACK_TARGET               = 0x00100000, // 20 Stop attack after use this spell (and not begin attack if use)
   SPELL_ATTR0_IMPOSSIBLE_DODGE_PARRY_BLOCK     = 0x00200000, // 21 Cannot be dodged/parried/blocked
   SPELL_ATTR0_CAST_TRACK_TARGET                = 0x00400000, // 22 Client automatically forces player to face target when casting
   SPELL_ATTR0_CASTABLE_WHILE_DEAD              = 0x00800000, // 23 castable while dead?
   SPELL_ATTR0_CASTABLE_WHILE_MOUNTED           = 0x01000000, // 24 castable while mounted
   SPELL_ATTR0_DISABLED_WHILE_ACTIVE            = 0x02000000, // 25 Activate and start cooldown after aura fade or remove summoned creature or go
   SPELL_ATTR0_NEGATIVE_1                       = 0x04000000, // 26 Many negative spells have this attr
   SPELL_ATTR0_CASTABLE_WHILE_SITTING           = 0x08000000, // 27 castable while sitting
   SPELL_ATTR0_CANT_USED_IN_COMBAT              = 0x10000000, // 28 Cannot be used in combat
   SPELL_ATTR0_UNAFFECTED_BY_INVULNERABILITY    = 0x20000000, // 29 unaffected by invulnerability (hmm possible not...)
   SPELL_ATTR0_BREAKABLE_BY_DAMAGE              = 0x40000000, // 30
   SPELL_ATTR0_CANT_CANCEL                      = 0x80000000  // 31 positive aura can't be canceled

Extracted from Trinity Core Source (SharedDefined.h). Ascathos 13:54, 5 October 2012 (UTC)