====== Data lump ======

[[WAD]] files consist of //data lumps// and a [[WAD directory]]. Each data lump is identified by a case-insensitive name whose length is at most 8 characters.

//Marker lumps// are special data lumps that have no data (their length is zero), but their location in the [[WAD directory]] is used as information. For instance, the location of the lumps that contain data for a map is marked by a marker lump.