Spawner at a fixed location
Reset
Single table entry to create
a single mobile; respawns when mobile is
deleted.
Triggered reset
Single table entry to spawn
something when a player gets near
(eggs in CRPG parlance); also capped at one instance
Generator
Like a reset or triggered
reset, except its uncapped or spawns on
an interval.
Rotating reset
Like one of the above,
except that there are multiple entries that
are rotated amongst so that successive visits
yield different mobiles