The dada command accepts several command-line options. See the UNIX manual page supplied for details. This is a two-line comment. You are not expected to understand this. Identifiers An identifier in pb is any sequence of letters, digits, underscores and hyphens which starts with a letter or underscore.
Identifiers are case-sensitive.
A literal string in pb is any sequence of characters embedded in quotes. Unlike in C, a string may contain unquoted newlines. Grammars and Rules Atoms Atoms are the building blocks of rules. Each atom is a self-contained element which performs a function, usually generating text. Atoms are divided into several types.