Next: IF - Instruction Up: The Language Previous: Structure of a

### Structure of a CAD Command :

A CAD command has the following schematic structure:

Operator Operand Characterization Parameter; ... !

- Operator :

  = action ( what to do ? )

  e.g. CREATE , LOAD , RUN , ...

- Operand :

  = object ( with what shall the command do something ? )

  e.g. POINT , LINE , HISTORY , ...

- Characterization :

  ( how shall the command do something ? )

  e.g. PP , DX , CAR , ...

- Parameter :

  ( values, with which the command works ? )

  Parameters are put in as follows: 'Keyword = configuration ;'

  The keyword is used to identify the parameter.

  e.g. P1 , BZP , ...

  The configuration is depending on the parameter and is described in chapter 2.1.3. Parameters are separated with a semicolon.

- ! :

  Each command is terminated with an exclamation mark. However, there are commands without operand and /or characterization and/or parameter.

  The description of the existing commands is contained in another documentation that is not included here.

  For parameters of special commands the following inputs are possible.

  keyword < configuration

  keyword <= configuration

  keyword > configuration

  keyword >= configuration