Morrowind Mod:TES3 File Format

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The file format of the esp and esm mod files is a database of records and sub-records.

Records

Main article: File Format Records

Record Name	Description
TES3	File header.
GMST	A game setting.
GLOB	A script global variable.
CLAS	A character class.
FACT	A faction.
RACE	A character race.
SOUN	An in-game sound.
SKIL	A character skill.
MGEF	A magic effect, such as Fire Damage or Telekinesis.
SCPT	A script.
REGN	A world region such as the Bitter Coast Region.
BSGN	A birthsign.
LTEX	A land texture.
STAT	A static object.
DOOR	A door.
MISC	A miscellaneous item.
WEAP	A weapon.
CONT	A container.
SPEL	A spell.
CREA	A creature.
BODY	A body part.
LIGH	A light.
ENCH	An enchanting effect.
NPC_	An NPC.
ARMO	Armor.
CLOT	An item of clothing.
REPA	A repair item.
ACTI	An activator.
APPA	An alchemy apparatus such as a calcinator or a mortar and pestle.
LOCK	A lockpick.
PROB	A probe.
INGR	An ingredient.
BOOK	A book.
ALCH	A potion.
LEVI	Levelled items.
LEVC	Levelled creatures.
CELL	An external or an internal cell.
LAND	Landscape.
PGRD	A cell pathgrid.
SNDG	A sound generator.
DIAL	A dialogue topic.
INFO	A dialogue response.

Sub-records

Main article: File Format Sub-Records

Each record contains several different sub-records. Each sub-record stores the different kinds of data needed by that record. For example, a MISC record (an item record) will have NAME and FNAM (there is more). NAME stores the id of the item, while FNAM stores the in-game name. Sub-records are not necessarily unique to a record; such as FNAM which can be found in many different records.

External Links

UESP page
Dave Humphrey's List
ESTemplate.ini
Jim Adam's page