The first field is the name of the spell.
Tag Name: CASTTIME
Variable(s) Used: Text
Example(s): CASTTIME:1 Round
WHAT IT DOES: reports the time it takes to cast this spell
Tag Name: COMPS:
Variable(s) Used: V, S, M, DF
Example(s): COMPS:V S M DF
WHAT IT DOES: Lists the types of spell components required for this spells (Verbal, Somatic, etc)
Tag Name: COST
Variable(s) Used: Numeric
Example(s): COST:300
WHAT IT DOES: This is the cost of the spells components
Tag Name: DURATION
Variable(s) Used: Text
Example(s): DURATION:1 Round/Level
WHAT IT DOES: Reports the duration of the spell
Tag Name: EFFECTS
Variable(s) Used: Text
Example(s): EFFECTS:Toasts the monsters with fire
WHAT IT DOES: Reports the effect of the spells
Tag Name: EFFECTTYPE
Variable(s) Used: Text
Example(s): EFFECTTYPE:Cone
WHAT IT DOES: Reports the Effect type of the spell (Cone, Personal, Touch, etc)
Tag Name: ITEM
Variable(s) Used: Text
Example(s): ITEM:Potion
WHAT IT DOES: Tells PCGen what types of items this spell can be used to make (Potions, wands, wondrous items, etc)
Tag Name: DESCRIPTOR
Variable(s) Used: Text
Example(s): DESCRIPTOR:Sonic|Acid|Evil
WHAT IT DOES: Reports what types the spell is and is used for specialist wizards to determine their favored schools bonus spells.
Tag Name: RANGE
Variable(s) Used: Text
Example(s): RANGE:Medium (100' + 5/lv)
WHAT IT DOES: Reports the range that the spell has.
Tag Name: SAVINFO
Variable(s) Used: Text
Example(s): SAVINFO:Will Negates
WHAT IT DOES: Reports whether or not there is a save for the spell.
Tag Name: SCHOOL
Variable(s) Used: Text (Spell School Names)
Example(s): SCHOOL:Divination
WHAT IT DOES: Reports what School the spell belongs to and is used for specialist wizards to determine their favored schools bonus spells.
Tag Name: SUBSCHOOL
Variable(s) Used: Text (Spell Sub-School Names)
Example(s): SUBSCHOOL:Divination
WHAT IT DOES: Reports what Sub-School the spell belongs to and is used for specialist wizards to determine their favored schools bonus spells.
Tag Name: SPELLRES
Variable(s) Used: Text
Example(s): SPELLRES:Yes
WHAT IT DOES: Indicates whether the character can try to resist the spell based on their Spell Resistance number.
Tag Name: XPCOST
Variable(s) Used: Numeric
Example(s): XPCOST:1250
WHAT IT DOES: Denotes how much the spell costs to cast, used for determining potion, wand, etc costs.