#### 4.2.1 Data Type Definition

Information about type usage is located in the sections specified in Figure~4–1. Figure~4–7 lists some classes that are particularly relevant to the object system. Figure~9–1 lists the defined condition types.

      Section                                Data Type
      _________________________________________________________________________
      Classes                        Object System types
      Slots                          Object System types
      Objects                        Object System types
      Generic Functions and Methods  Object System types
      Condition System Concepts      Condition System types
      Types and Classes              Miscellaneous types
      Syntax                         All types—read and print syntax
      The Lisp Printer               All types—print syntax
      Compilation                    All types—compilation issues

               Figure 4–1: Cross-References to Data Type Information