SpellBookItemInfo

actionID

number (Represents a base spellID for spells, flyoutID for flyouts, or petActionID for pet actions)

spellID

number, optional (May be nil if item is not a spell; Will be the overriding spellID if spell is overriden, otherwise will match actionID)

itemType

SpellBookItemType

name

string

subName

string (May be empty if flyout, or if spell's data isn't loaded yet; Listen for SPELL_TEXT_UPDATE event, or use SpellMixin to load asynchronously)

iconID

fileID

isPassive

bool (True if the item is a passive spell; Will always be false if it is not a spell)

isOffSpec

bool (True if the item belongs to a non-active specialization)

skillLineIndex

luaIndex, optional (Index of the SkillLine this SpellBookItem is part of; Nil this SpellBookItem isn't part of a SkillLine)

Present since at least 1.60.1.70707, the first build we track.