Chapter 7 Emulation
7-46
PJL variables
PJL uses alphanumeric variables, numeric variables, and strings. The following explains
the three types of variables and their ranges.
Alphanumeric variables
Any combination of letters and digits, with the rule that the first character must always
be a letter. Letters can consist of the uppercase letters (ASCII 65 through 90) and lower-
case letters (ASCII 97 through 122). Digits can consist of numbers 0 through 9 (ASCII
48 through 57).
Example of valid alphanumeric variables:
Alpha 635
X2000
Examples of invalid alphanumeric variables:
635Alpha
(Alphanumeric variables must begin with a letter)
X 2000
(Space characters [ASCII 32] are not allowed in alphanumeric variables)
Numeric variables
Any number consisting of digits, with one optional decimal point and an optional plus
(+) or minus (–) sign preceding the first digit. Only one decimal point may be used. It
must also be placed somewhere after the first digit. Digits are unnecessary after the deci-
mal point.
Examples of valid numeric variables:
0.123456
–123.456
+657000
2468.
Examples of invalid numeric variables:
.123456
(The decimal point must be preceded by at least 1 digit).
–123.45.6
(Only 1 decimal point is allowed in a numeric variable).
+657,000
(Commas should not be used in numeric variables).
Strings
Strings should be enclosed in quotation marks, and consist of any combination of charac-
ters of ASCII codes from 32 through 255 including 9 (horizontal tab) but excluding 34
(quotation marks). Examples are as follows.
Examples of valid strings:
"Model:<HT>FS-9500DN" — Tabs are allowed in a string.
"The Arlington Ball Park"
Examples of invalid strings:
"It is 3.5" long." — A string should not contain quotation marks.
"Telephone number<CR>01234-5678"
— <CR> is out of the valid range of ASCII characters for a string.
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