The following typographical conventions are used in this book:
- 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, 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.
Note
This icon signifies a tip, suggestion, or general note.
Warning
This icon indicates a warning or caution.
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