instance set

An instance set is a chain of components each of which yields an instance flow. The component at the end of the chain provides a final output instance flow.

For example, a path component could by itself yield an instance set or, instead, the path is followed by a selection which yields a single instance whose method is invoked which yields an instance set which is traversed by another path into yet another selection to yield a final result.

Newly created instance

A new_instance yields a reference to the newly created instance as output.

Initial components

These kinds of components may initiate a multicomponent instance set

• operation : Invokes a Method, Operation, or type operation.
• prefix_name : Name that may be preceded by rank operator
• path : Defines a sequence of hops through the class model, see Path