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Syntax diagrams appear in monospace type and use the following conventions:
UPPERCASE |
Uppercase type denotes reserved words. You must include reserved words in statements, but they can be upper or lower case. |
lowercase |
Lowercase type denotes either user-supplied elements or names of other syntax diagrams. User-supplied elements include names of tables, host-language variables, expressions, and literals. Syntax diagrams can refer to each other by name. If a diagram is named, the name appears in lowercase type above and to the left of the diagram, followed by a double-colon (for example, privilege ::). The name of that diagram appears in lowercase in diagrams that refer to it. |
{ } |
Braces denote a choice among mandatory elements. They enclose a set of options, separated by vertical bars ( | ). You must choose at least one of the options. |
[ ] |
Brackets denote an optional element or a choice among optional elements. |
| |
Vertical bars separate a set of options. |
... |
A horizontal ellipsis denotes that the preceding element can optionally be repeated any number of times. |
( ) , ; |
Parentheses and other punctuation marks are required elements. Enter them as shown in syntax diagrams. |
