2.3 Naming Conventions

Symbolic names may contain alphabetic characters, the underscore character (_), and decimal digits, where the first character must be alphabetic or an underscore. Upper case characters will be folded to lower case. Therefore, the names

abc abC aBc aBC Abc AbC ABc ABC

would all refer to the same symbol. The T3X compiler always uses all characters contained in two symbols to distinguish them, so

very_very_very_long_symbol_number_one

and

very_very_very_long_symbol_number_two

are guaranteed to be different. The maximum length of symbol names may be limited by other factors, though (like the maximum length of a token).