[Preface] Conventions Used in This BookPreface Conventions Used in This BookThe following conventions are used in this book:ItalicUsed for script, file, and directory namesConstant widthUsed for code examples, HTML tags and attributes, and XML tags and elementsConstant width italicIn code examples, indicates an element (e.g., a parameter) that you supplyUPPERCASEGenerally indicates Oracle keywords, including package nameslowercaseIn code examples, generally indicates user-defined items such as variables and procedure names|In code examples, a vertical bar indicates that you must choose only one from the list (e.g., IN | OUT | IN OUT)TIP: The owl icon indicates a tip, suggestion, or general note. For example, we'll tell you if you need to use a particular Oracle version or if an operation requires certain privileges.WARNING: The turkey icon indicates a warning or caution. For example, we'll tell you if Oracle does not behave as you'd expect or if a particular operation has a negative impact on performance.Structure of This BookComments and Questions Copyright (c) 2000 O'Reilly & Associates. All rights reserved.