Tag

Behaviour in doom is controlled by using a combination of tags and types applied to linedefs and sectors. Tags are used to relate an action, as specified by a linedef type, to the sector on which it should affect.

Normally, a tag is an arbitrary non-zero integer, specified in the tag field of linedef and sector entries.

The Boom engine greatly extended the number of sector and linedef types, as well as introducing behaviours that involve Things.

Types

 * Linedef types
 * Sector types