| The following typographical conventions are used in this book:
Plain text -
Indicates menu titles, menu options, menu buttons, and keyboard accelerators (such as Alt and Ctrl).
Italic -
Indicates new terms, URLs, email addresses, filenames, file extensions, pathnames, directories, and Unix utilities.
Constant width -
Indicates commands, options, switches, variables, attributes, keys, functions, types, controls, classes, namespaces, methods, modules, properties, parameters, values, objects, events, event handlers, XML tags, HTML tags, macros, the contents of files, or the output from commands.
Constant width bold -
Shows commands or other text that should be typed literally by the user. Bold is also used in code samples to highlight lines of code that are discussed in the text.
Constant width italic -
Shows text that should be replaced with user-supplied values.  | This icon signifies a tip, suggestion, or general note. |
|
 | This icon indicates a warning or caution. |
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