text: #!/usr/bin/python3
  OK = 0
  ARG_ERROR = 10
  FILE_OPEN_ERROR = 11
  XML_FORMAT = 31
  XML_STRUCTURE = 32
  SEMANTIC_ERROR = 52
  OPERAND_ERROR = 53
  VARIABLE_ERROR = 54
  FRAME_ERROR = 55
  MISSING_VALUE_ERROR = 56
  WRONG_VALUE_ERROR = 57
  STRING_ERROR = 58