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 below, 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 element 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 have been omitted.

1In a syntax statement, the space symbol 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 key or 4Shift5 represents the

 

 

 

 

shift key.

 

 

 

 

4

 

5character

4

 

5character indicates a con trol character. For example, 4

 

5Y

CTRL

CTRL

CTRL

 

 

 

 

means that you press the control key and the Y key simultaneously.

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