Safari Books Online is a digital library providing on-demand subscription access to thousands of learning resources.
You can view the built-in documentation, or dictionary, of any scriptable application or scripting addition using AppleScript Editor's dictionary viewer. You can open a dictionary viewer in several different ways:
Select File Open Dictionary in the menu bar and choose one or more entries from the list of installed applications.
Drag-and-drop an application or scripting addition file onto AppleScript Editor's application icon in the Finder.
Double-click an application or scripting addition name in AppleScript Editor's Library window.