The ApplicationDomain class is a container for discrete groups of class
definitions. Application domains are used to partition classes that are in
the same security domain. They allow multiple definitions of the same
class to exist and allow children to reuse parent definitions.
Application domains are used when an external SWF file is loaded through
the Loader class. All ActionScript 3.0 definitions in the loaded SWF file
are stored in the application domain, which is specified by the
The Capabilities class provides properties that describe the system and runtime that are hosting the application. For example, a mobile phone's screen might be 100 square pixels, black and white, whereas a PC screen might be 1000 square pixels, color. By using the Capabilities class to determine what capabilities the client has, you can provide appropriate content to as many users as possible. When you know the device's capabilities, you can tell the server to send the appropriate SWF files or tell the SWF file to alter its presentation. However, some capabilities of Adobe AIR are not listed as properties in the Capabilities class. They are properties of other classes:
The LoaderContext class provides options for loading SWF files and other
media by using the Loader class. The LoaderContext class is used as the
The Security class lets you specify how content in different domains can communicate with each other.
The SecurityDomain class represents the current security "sandbox," also
known as a security domain. By passing an instance of this class to
The System class contains properties related to local settings and operations. Among these are settings for camers and microphones, operations with shared objects and the use of the Clipboard.
The TouchscreenType class is an enumeration class that provides values for
the different types of touch screens.
Use the values defined by the TouchscreenType class with the