·	Components

·	Invocative Constraints

·	Defining External Components in the Repository

·	Writing an External Component

·	Invoking Components from a USoft Application

·	When and How Many Times a Component Is Invoked

·	Rules-Driven Method Invocation (RDMI)

·	Standard Protocol and Query Protocol for Method Calling

·	When to Use the Query Protocol

·	How the Query Protocol for Method Calling Works

·	INVOKE: Example 1

·	INVOKE: Example 2

·	INVOKE: Example 3

·	INVOKE: Example 4