Conventions (continued)

[ . . .

]

In a syntax statement, horizontal ellipses enclosed in brac kets

 

 

indicate that you can repeatedly select the elemen t(s) that appear

 

 

within the immediately preceding pair of brac kets or braces. In the

 

 

example below, you can select parameter zero or more times. Eac h

 

 

instance of parameter must be preceded by a comma:

 

 

[,parameter][...]

 

 

In the example belo w, you only use the comma as a delimiter if

 

 

parameter is repeated; no comma is used before the ￿rst occurrence

 

 

of parameter :

 

 

[parameter][,...]

. . .

In a syntax statement, horizontal ellipses enclosed in v ertical bars

 

 

indicate that you can select more than one elemen t within the

 

 

immediately preceding pair of brac kets or braces. However, each

 

 

particular elemen t can only be selected once. In the follo wing

 

 

example, you must select A, AB, BA , or B. The elements cannot be

 

 

repeated.

 

 

A

 

 

￿ B ￿. . .

.. . In an example, horizon tal or vertical ellipses indicate where portions of an example ha ve been omitted.

1In a syntax statement, the space sym bol 1 shows a required blank. In the following example, parameter and parameter must be separated with a blank:

 

 

(parameter)1(parameter)

4

5

The symbol 4

5 indicates a key on the keyboard. For example,

4RETURN5 represents the carriage return k ey or 4Shift5 represents the shift key.

4CTRL5character 4CTRL5character indicates a control character. For example, 4CTRL5Y means that you press the control key and the Y key simultaneously.

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