Table 27–1 describes the BNF symbols used in this chapter.
Table 27–1 BNF Symbol Summary
Symbol |
Description |
---|---|
::= |
The element to the left of the symbol is defined by the constructs on the right. |
* |
The preceding construct may occur zero or more times. |
{...} |
The constructs within the curly braces are grouped together. |
[...] |
The constructs within the square brackets are optional. |
| |
An exclusive OR. |
BOLDFACE |
A keyword (although capitalized in the BNF diagram, keywords are not case-sensitive). |
White space |
A white space character can be a space, a horizontal tab, or a line feed. |