Language element | Explanation | Example |
| Keywords are shown in underlined uppercase letters. You must specify at least the underlined parts of a keyword. |
|
| Optional words are shown in uppercase letters without underlining. Such words may be omitted without altering the meaning of a statement. |
|
| Variables are shown in italic lowercase letters. In a format which contains variables, a current value must be entered in place of each variable. |
|
| Exactly one of the expressions enclosed in braces must be specified. |
|
| The expression in square brackets can be omitted. UDS/SQL then uses the default value The brackets themselves must no be specified. |
|
| The immediately preceding expression can be repeated several times if required. The two language elements distinguish between repetitions which use blanks and those which use commas. |
|
| Indicates where entries have been omitted for reasons of clarity. When the formats are used, these omissions are not allowed. |
|
| The period must be specified and must be followed by at least one blank. The underline must not be specified. |
|
| Means that at least one blank has to be specified. |
|
Table 3: Notational conventions
All other characters such as ( ) , . ; “ = are not metacharacters;
they must be specified exactly as they appear in the formats.