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| Chapter 1 Oracle PL/SQL Language Pocket Reference |

## 1.3 Conventions

UPPERCASE indicates PL/SQL keywords.

lowercase indicates user-defined items such as parameters.

Italic indicates file names and parameters within text.

`Constant width` is used for code examples.

`[]` enclose optional items in syntax descriptions.

`{ }` enclose a list of items in syntax descriptions; you must choose one item from the list.

`|` separates bracketed list items in syntax descriptions.

1.2 Acknowledgments |  | 1.4 PL/SQL Language Fundamentals

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