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0.3. Conventions Used in This Book

Items appearing in this book are sometimes given a special appearance to set them apart from the regular text. Here's how they look:

Used for citations of books and articles, commands, email addresses, and URLs

Constant width
Used for literals, constant values, code listings, and XML markup

Constant-width bold
Used to indicate user input

Constant-width italic
Used for replaceable parameter and variable names


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