Conventions Used in This Book

Since we pretty much made them up as we went along to fit different circumstances, we describe them as we go along, too. In general, though, the names of files and UNIX utilities are printed in italics, the names of Perl functions, operators, and other keywords of the language are in bold, and examples or fragments of Perl code are in constant width, and generic code terms for which you must substitute particular values are in italic constant width. Data values are represented by constant width in roman quotes, which are not part of the value.