# OC Symbols Symbols for the open Challange The formalized behavior references a variety of input and output symbols, which can stand for variables or functions of the agent's software. Constants are constant decimal values. ## Input Symbols
Name | Type | Measure | Description
move-message-sent | boolean | true/ false | Guide dog sends message to move forward
move-message-received | boolean | true/ false | Guide Dog receives message to move forward
turn-message-sent | boolean | true/ false | Guide dog sends message to turn
turn-message-received | boolean | true/ false | Blind dog receives message to turn
## Constants
Name | Value | Measure | Description
need-a-symbol-to-compile | 700 |  | xtc cannot handle a empty file