target enum name consist of:

TARGET_[OBJECT_TYPE]_[REFERENCE_TYPE(skipped for caster)]_[SELECTION_TYPE(skipped for default)]_[additional specifiers(friendly, BACK_LEFT, etc.]

By themselves

• TARGET_UNIT_CASTER = 1

The target is the caster.

• TARGET_UNIT_NEARBY_ENEMY = 2

• TARGET_UNIT_NEARBY_PARTY = 3

• TARGET_UNIT_NEARBY_ALLY = 4

• TARGET_UNIT_PET = 5

• TARGET_UNIT_TARGET_ENEMY = 6

• TARGET_UNIT_SRC_AREA_ENTRY = 7

• TARGET_UNIT_DEST_AREA_ENTRY = 8

• TARGET_DEST_HOME = 9

• TARGET_UNIT_SRC_AREA_UNK_11 = 11

• TARGET_UNIT_SRC_AREA_ENEMY = 15

• TARGET_UNIT_DEST_AREA_ENEMY = 16

• TARGET_DEST_DB = 17

• TARGET_DEST_CASTER = 18

• TARGET_UNIT_CASTER_AREA_PARTY = 20

• TARGET_UNIT_TARGET_ALLY = 21

• TARGET_SRC_CASTER = 22

• TARGET_GAMEOBJECT_TARGET = 23

• TARGET_UNIT_CONE_ENEMY_24 = 24

• TARGET_UNIT_TARGET_ANY = 25

• TARGET_GAMEOBJECT_ITEM_TARGET = 26

• TARGET_UNIT_MASTER = 27

• TARGET_DEST_DYNOBJ_ENEMY = 28

• TARGET_DEST_DYNOBJ_ALLY = 29

• TARGET_UNIT_SRC_AREA_ALLY = 30

• TARGET_UNIT_DEST_AREA_ALLY = 31

• TARGET_DEST_CASTER_SUMMON = 32

• TARGET_UNIT_SRC_AREA_PARTY = 33

• TARGET_UNIT_DEST_AREA_PARTY = 34

• TARGET_UNIT_TARGET_PARTY = 35

• TARGET_DEST_CASTER_UNK_36 = 36

• TARGET_UNIT_LASTTARGET_AREA_PARTY = 37

• TARGET_UNIT_NEARBY_ENTRY = 38

• TARGET_DEST_CASTER_FISHING = 39

• TARGET_GAMEOBJECT_NEARBY_ENTRY = 40

• TARGET_DEST_CASTER_FRONT_RIGHT = 41

• TARGET_DEST_CASTER_BACK_RIGHT = 42

• TARGET_DEST_CASTER_BACK_LEFT = 43

• TARGET_DEST_CASTER_FRONT_LEFT = 44

• TARGET_UNIT_TARGET_CHAINHEAL_ALLY = 45

• TARGET_DEST_NEARBY_ENTRY = 46

• TARGET_DEST_CASTER_FRONT = 47

• TARGET_DEST_CASTER_BACK = 48

• TARGET_DEST_CASTER_RIGHT = 49

• TARGET_DEST_CASTER_LEFT = 50

• TARGET_GAMEOBJECT_SRC_AREA = 51

• TARGET_GAMEOBJECT_DEST_AREA = 52

• TARGET_DEST_TARGET_ENEMY = 53

• TARGET_UNIT_CONE_ENEMY_54 = 54

• TARGET_DEST_CASTER_FRONT_LEAP = 55

• TARGET_UNIT_CASTER_AREA_RAID = 56

• TARGET_UNIT_TARGET_RAID = 57

• TARGET_UNIT_NEARBY_RAID = 58

• TARGET_UNIT_CONE_ALLY = 59

• TARGET_UNIT_CONE_ENTRY = 60

• TARGET_UNIT_TARGET_AREA_RAID_CLASS = 61

• TARGET_UNK_62 = 62

• TARGET_DEST_TARGET_ANY = 63

• TARGET_DEST_TARGET_FRONT = 64

• TARGET_DEST_TARGET_BACK = 65

• TARGET_DEST_TARGET_RIGHT = 66

• TARGET_DEST_TARGET_LEFT = 67

• TARGET_DEST_TARGET_FRONT_RIGHT = 68

• TARGET_DEST_TARGET_BACK_RIGHT = 69

• TARGET_DEST_TARGET_BACK_LEFT = 70

• TARGET_DEST_TARGET_FRONT_LEFT = 71

• TARGET_DEST_CASTER_RANDOM = 72

• TARGET_DEST_CASTER_RADIUS = 73

• TARGET_DEST_TARGET_RANDOM = 74

• TARGET_DEST_TARGET_RADIUS = 75

• TARGET_DEST_CHANNEL_TARGET = 76

• TARGET_UNIT_CHANNEL_TARGET = 77

• TARGET_DEST_DEST_FRONT = 78

• TARGET_DEST_DEST_BACK = 79

• TARGET_DEST_DEST_RIGHT = 80

• TARGET_DEST_DEST_LEFT = 81

• TARGET_DEST_DEST_FRONT_RIGHT = 82

• TARGET_DEST_DEST_BACK_RIGHT = 83

• TARGET_DEST_DEST_BACK_LEFT = 84

• TARGET_DEST_DEST_FRONT_LEFT = 85

• TARGET_DEST_DEST_RANDOM = 86

• TARGET_DEST_DEST = 87

• TARGET_DEST_DYNOBJ_NONE = 88

• TARGET_DEST_TRAJ = 89

• TARGET_UNIT_TARGET_MINIPET = 90

• TARGET_DEST_DEST_RADIUS = 91

• TARGET_UNIT_SUMMONER = 92

• TARGET_CORPSE_SRC_AREA_ENEMY = 93

• TARGET_UNIT_VEHICLE = 94

• TARGET_UNIT_TARGET_PASSENGER = 95

• TARGET_UNIT_PASSENGER_0 = 96

• TARGET_UNIT_PASSENGER_1 = 97

• TARGET_UNIT_PASSENGER_2 = 98

• TARGET_UNIT_PASSENGER_3 = 99

• TARGET_UNIT_PASSENGER_4 = 100

• TARGET_UNIT_PASSENGER_5 = 101

• TARGET_UNIT_PASSENGER_6 = 102

• TARGET_UNIT_PASSENGER_7 = 103

• TARGET_UNIT_CONE_ENEMY_104 = 104

• TARGET_UNIT_UNK_105 = 105

• TARGET_DEST_CHANNEL_CASTER = 106

• TARGET_UNK_DEST_AREA_UNK_107 = 107

• TARGET_GAMEOBJECT_CONE = 108

• TARGET_DEST_UNK_110 = 110