| The following typographical conventions are used in this book: Italic Used for object IDs, URLs, filenames, and directory names. It is also used for emphasis and for the first use of technical terms. Constant width Used for examples, object definitions, literal values, textual conventions, and datatypes. It is also used to show source code, the contents of files, and the output of commands. Constant width bold Used in interactive examples to show commands or text that would be typed literally by the user. It is also used to emphasize when something, usually in source code or file-contents examples, has been added to or changed from a previous example. Constant width italic Used for replaceable parameter names in command syntax.
| Indicates a tip, suggestion, or general note. |
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| Indicates a warning or caution. |
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