
368 9 Chapter 18: Building Blocks and Types
is, they are of fixed size and contents), or they can be mutable. All
are described here.
Property lists provide a convenient way of storing information; they
work together with XML to manage information without your need-
ing to worry about formats and field widths. They are implemented
using the dictionaries described in this chapter.
Preferences (Carbon) and defaults (Cocoa) pull together even more
of these technologies to help you provide customization for specific
applications, specific users, and specific computer environments.
A section showing you how to create objects in Objective-C and ...