Documentation Conventions for Keywords = the equal sign must be entered, req.param2 must be replaced with a value, variable, or expression, OPT.KEYWORD can be omitted but must be entered exactly as shown if used, opt.param may be replaced with a value, variable, or expression but assumes a default value if not used. Function This section gives a brief description of the keyword. Usage Considerations This section lists any restrictions on the keyword's use. If specific hardware or other options are required, they are listed here. Parameters The requirements for input and output parameters are explained in this section. If a parameter is optional, it is noted here.
When an instruction line is entered, optional parameters do not have to be specified and the system will assume a default. Unspecified parameters at the end of an argument list can be ignored. Unspecified parameters in the middle of an argument list must be represented by commas. For example, the following keyword has four parameters-the first and third are used, and the second and fourth are left unspecified: SAMPLE.INST var_1,,"test" String and numeric input parameters can be constant values (3.32, part_1, etc.) or any legitimate variable names. The data type of the constant or variable must agree with that expected by the instruction. String variables must be preceded with a $.
Precision-point variables must be preceded with a #. Belt variables must be preceded with a %. String constants must be enclosed in quotes. Real and integer constants can be used without modification. Note that some eV+ keywords cannot be used as variable names. Details This section describes the function of the keyword in detail. eV+Language Reference Guide, v2.x, 18319-000 Rev A Page 43