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In this document, we will use some meta-syntactic features to describe commands. Literal tokens (such as LITERAL-TOKEN) appear in a typewriter font. Non-terminals look like this: non-terminal. The line-feed, carriage-return, and space characters are represented as LF, CR, and SPC, respectively. Alternation (choice among two or more possibilities) looks like: (option1 or option2 )

We also use the following meta-syntactic constructs:

Padma Indraganti
Thu Jun 20 13:02:20 PDT 1996