3.2.2 Symbol Names
Unless quoted, symbol names start with a letter, underscore, or point
and may include any letters, underscores, digits, points,
and hyphens. Unquoted symbol names must not conflict with any
keywords. You can specify a symbol which contains odd characters or has
the same name as a keyword, by surrounding the symbol name in double quotes:
| "SECTION" = 9;
"with a space" = "also with a space" + 10;
|
Since symbols can contain many non-alphabetic characters, it is safest
to delimit symbols with spaces. For example, `A-B' is one symbol,
whereas `A - B' is an expression involving subtraction.
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