[syntax] (original) (raw)

In the syntax notation used in this document, syntactic categories are indicated by italic, sans-serif type, and literal words and characters in constant width type.

Alternatives are listed on separate lines except in a few cases where a long set of alternatives is marked by the phrase “one of”.

If the text of an alternative is too long to fit on a line, the text is continued on subsequent lines indented from the first one.

An optional terminal or non-terminal symbol is indicated by the subscript “”, so

indicates an optional expression enclosed in braces.