This is a message I recently found on Fido net...


The following is a list of Linedef types posted on the Doom-editor's
mailing list by DOOM God John Romero.  This is the first complete and
comprehensive listing available.  You can use these numbers in DEU, even
where DEU doesn't have a specific name for them...

1:Manual_Door_Raise
2:Trigger_Open_Door
3:Trigger_Close_Door
4:Trigger_Raise_Door
5:Trigger_Raise_Floor
6:Trigger_Fast_Crush_&_Raise
7:Switch_Build_Stairs
8:Trigger_Build_Stairs
9:Switch_Change_Donut
10:Trigger_PlatDownWaitUpStay
11:Switch_EXIT
12:Trigger_LightTurnOn
13:Trigger_LightTurnOn255
14:Switch_RaiseFloor32
15:Switch_RaiseFloor24
16:Trigger_CloseDoor30
17:Trigger_StartSlowStrobing
18:Switch_RaiseToNearestFloor
19:Trigger_LowerFloor
20:Switch_RaiseFloorNear&Change
21:Switch_PlatDownWaitUpStay
22:Trigger_RaiseFloorNear&Change
23:Switch_Lower_FloorToLowest
24:Impact_RaiseFloor
25:Trigger_CeilingCrush&Raise
26:Manual_Door_Raise_Blue
27:Manual_Door_Raise_Yellow
28:Manual_Door_Raise_Red
29:Switch_Raise_Door
30:Trigger_RaiseToShortTexture
31:Manual_Door_Open
32:Manual_Door_Open_Blue
33:Manual_Door_Open_Red
34:Manual_Door_Open_Yellow
35:Trigger_Lights_Very_Dark
36:Trigger_Turbo_Lower_Floor
37:Trigger_LowerFloor&Change
38:Trigger_Lower_Floor_To_Lowest
39:Trigger_TELEPORT
40:Trigger_LowerFloorRaiseCeiling
41:Switch_Lower_Ceiling_To_Floor
42:Button_Close_Door
43:Button_Lower_Ceiling_To_Floor
44:Trigger_Ceiling_Crush
45:Button_Lower_Floor
46:Impact_OpenDoor
47:Impact_RaiseFloorNear&Change
48:Effect_Firstcol_Scroll
49:Switch_CeilingCrush&Raise
50:Switch_Close_Door
51:Switch_SecretExit
52:Trigger_EXIT
53:Trigger_PerpetualPlatformRaise
54:Trigger_PlatformStop
55:Switch_Raise_FloorCrush
56:Trigger_Raise_FloorCrush
57:Trigger_CeilingCrushStop
58:Trigger_Raise_Floor_24
59:Trigger_Raise_Floor_24&Change
60:Button_Lower_Floor_To_Lowest
61:Button_Open_Door
62:Button_Plat_Down_Wait_Up_Stay
63:Button_Raise_Door
64:Button_Raise_Floor
65:Button_Raise_Floor_Crush
66:Button_Raise_Floor_24
67:Button_Raise_Floor_32
68:Button_Raise_Floor_Near&Change
69:Button_Raise_To_Nearest_Floor
70:Button_Turbo_Lower_Floor
71:Switch_Turbo_Lower_Floor
72:Retrigger_Ceiling_Crush
73:Retrigger_Ceiling_Crush_&_Raise
74:Retrigger_Ceiling_Crush_Stop
75:Retrigger_Close_Door
76:Retrigger_Close_Door_30
77:Retrigger_Fast_Crush_&_Raise
78:Retrigger_LightsToDimmestNear
79:Retrigger_Lights_Very_Dark
80:Retrigger_Light_Turn_On
81:Retrigger_Light_Turn_On_255
82:Retrigger_Lower_Floor_To_Lowest
83:Retrigger_Lower_Floor
84:Retrigger_Lower_Floor_&_Change
85:Retrigger_LwrFloorRaiseCeiling
86:Retrigger_Open_Door
87:Retrigger_Perpetual_Plat_Raise
88:Retrigger_PlatDownWaitUpStay
89:Retrigger_Platform_Stop
90:Retrigger_Raise_Door
91:Retrigger_Raise_Floor
92:Retrigger_Raise_Floor_24
93:Retrigger_RaiseFloor24_&_Change
94:Retrigger_Raise_Floor_Crush
95:Retrigger_RaiseFloorNear&Change
96:Retrigger_Raise_ToShortTexture
97:Retrigger_TELEPORT
98:Retrigger_Turbo_Lower_Floor
99:Manual_Door_Raise
100:Trigger_BuildStairsTurbo16
101:Switch_Raise_Floor
102:Switch_Lower_Floor
103:Switch_Open_Door
104:Trigger_Lights_To_Dimmest_Near
105:Retrigger_Blazing_Door_Raise
106:Retrigger_Blazing_Door_Open
107:Retrigger_Blazing_Door_Close
108:Trigger_Blazing_Door_Raise
109:Trigger_Blazing_Door_Open
110:Trigger_Blazing_Door_Close
111:Switch_Blazing_Door_Raise
112:Switch_Blazing_Door_Open
113:Switch_Blazing_Door_Close
114:Button_Blazing_Door_Raise
115:Button_Blazing_Door_Open
116:Button_Blazing_Door_Close
117:Manual_Blazing_Door_Raise
118:Manual_Blazing_Door_Open
119:Trigger_RaiseToNearestFloor
120:Retrigger_BlazeDownWaitUpStay
121:Trigger_BlazeDownWaitUpStay
122:Switch_BlazeDownWaitUpStay
123:Button_BlazeDownWaitUpStay
124:Manual_Door_Slide_Open&Close
125:Trigger_TELEPORT_MonsterONLY
126:Retrigger_TELEPORT_MonsterONLY
127:Switch_BuildStairsTurbo16
128:Retrigger_RaiseToNearestFloor
129:Retrigger_Raise_Floor_Turbo
130:Trigger_Raise_Floor_Turbo
131:Switch_Raise_Floor_Turbo
132:Button_Raise_Floor_Turbo

These are linedefs activated by pressing a wall:

Switches = use only once
Buttons = use many times

These are linedefs activated by walking over them:

Trigger = use only once
ReTrigger = use many times
Impact = shoot to activate
Effect = something that always happens to a linedef
Manual = doors that don't need a tag

Blazing stuff can be used only with v1.4 & up

DownWaitUpStay = platform that goes down, waits, goes up, then stays.

All of these linedef types work in both DOOM v1.666 and DOOM][ v1.666
Happy DOOMing