Compiling Components With Flex 2 Sdk - Adobe FLEX 2 - CREATING AND EXTENDING COMPONENTS Manual

An ActionScript component in a subdirectory of the main application directory must
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define a fully qualified package name that is relative to the location of the application's
root directory. For example, if you define a custom component in the
dir1/dir2/myControls/PieChart.as file, its fully qualified package name must be
dir1.dir2.myControls, assuming dir1 is an immediate subdirectory of the main
application directory.
An MXML component does not include a package name definition. However, you must
■
declare a namespace definition in the file that references the MXML component that
corresponds to the directory location of the MXML component, either in a subdirectory
of the application's root directory, or in a subdirectory of the classpath. For more
information, see Chapter 7, "Creating Simple MXML Components," on page
An application can access MXML and ActionScript components in the directories
■
included in the ActionScript classpath. The component search order in the classpath is
based on the order of the directories listed in the classpath.
An ActionScript component in a subdirectory of a directory included in the classpath
■
must define a fully qualified package name that is relative to the location of the classpath
directory. For example, if you define a custom component in the file
dir1/dir2/myControls/PieChart.as, and dir1 is included in the ActionScript classpath, its
fully qualified package name must be dir1.dir2.myControls.
The
■ <mx:Script>
files, can reference components located in the ActionScript classpath.

Compiling components with Flex 2 SDK

How you compile an application with Adobe® Flex™ SDK is based on how you distribute your
custom components. This section describes how to compile an application that uses custom
components distributed as MXML, ActionScript, SWC, and RSL files.
Distributing components as MXML and
ActionScript files
When you compile an application with Flex 2 SDK, you define where the MXML and
ActionScript files for your custom components exist in the directory structure of your
application, or in the directory structure of components shared by multiple applications.
66 Compiling Components
tag in the main MXML file, and in dependent MXML component
77.