Operation type = 201

The one good time I had this doubt, and that takes a lot of you guys help me answer.
Now I'm translating and editing a mission that needs to have a knowledge of this operation, then I wanted someone to explain the function of this operation and how to use it.
exemple : type = 201 and param = data > 10
Thank you all.

I have been searching for this also but all what i find is this

Quote:

ACTION_NPC_ATTR = 201, // revises or the examination duty NPC attribute.“attr opt data npc_id”, at least 3 parameters.If assigns npc_id, this NPC must in the local sheet series.attr may choose " ownerid " (=, ==), “ownertype” (=, ==), “lookface” (=, ==), “data?”(=, +=, ==, <, <=, >, >=, pass. pass may let DateStamp which in the field saves fluctuate certain number of days. data may be " accept "), “datastr” (=, ==), “life” (=), “maxlife” (=)

I had already studied about it for a long time ago and did not understand, I still have many doubts.
DATA0 == 1 means that a person will be accepted or system use this action? npc?