Inside Macintosh: AppleScript Language Guide / Part 2 - AppleScript Language Reference

Chapter 5 - Objects and References / Using Object Class Definitions

Commands Handled

Objects that belong to the same class can respond to the same commands. Object class definitions list the commands to which all objects of that
class respond.

Figure 5-1 The Scriptable Text Editor's object class definition for paragraph objects

The definition in Figure 5-1 shows that all paragraph objects respond to
the Copy, Count, Cut, Data Size, Delete, Exists, Get, Make, Move, Select,
and Set commands.