| 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.
- Bold
Emphasizes important text.
- Constant width
Indicates commands, options, switches, variables, attributes, keys, functions, types, classes, namespaces, methods, modules, properties, parameters, values, objects, events, event handlers, XML tags, HTML tags, macros, the contents of files, and the output from commands.
- Constant width bold
Shows commands or other text that should be typed literally by the user.
- 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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