This is clear enough for me:
*GAMEOBJECT_TYPE_CAPTUREPOINT = 29
- data0: radius (Distance)
- data1: spell (Unknown ID, not a spell id in dbc file, maybe server only side spell)
- data2: worldState1
- data3: worldstate2
- data4: winEventID1 (Unknown Event ID)
- data5: winEventID2 (Unknown Event ID)
- data6: contestedEventID1 (Unknown Event ID)
- data7: contestedEventID2 (Unknown Event ID)
- data8: progressEventID1 (Unknown Event ID)
- data9: progressEventID2 (Unknown Event ID)
- data10: neutralEventID1 (Unknown Event ID)
- data11: neutralEventID2 (Unknown Event ID)
- data12: neutralPercent
- data13: worldstate3
- data14: minSuperiority
- data15: maxSuperiority
- data16: minTime (in seconds)
- data17: maxTime (in seconds)
- data18: large? (Boolean flag)
I've used this before in one of my 'radius' capture system. Only real thing you need to worry about is the radius. Radius determines where you can start capturing the point. Anyway, not sure if that's what you're really asking for.