| Keyword[Keyword] | The keyword is mandatory.The keyword within
square brackets indicates that it is optional. |
| Variable | A variable value or string. |
| X | Y | Z | A bar between options or variables indicates
that you may choose only one. |
| (X | Y | Z) | A set of options enclosed in () and separated
by | indicates that you must specify one of the values. |
| [X | Y | Z] | A set of options enclosed in [] and separated
by a ‘|’ indicates that you mayspecify one or none of the values. |
| [X | Y | Z]* | A set of options enclosed in [ ] followed by
a * and separated by a ‘|’ indicates that you may specify one or
more values or none. |
| [X | Y | Z]+ | A set of keys/values enclosed in [ ] followed
by a + and separated by a ‘|’ indicates that you may specify one
or more than one value. |
