To create the request and response paths, request and response pipelines are PAIRED together and organized into a single-rooted tree structure. A branch node ALLOWS these pipeline pairs to be executed conditionally, and route nodes at the ends of the branches perform the request and response dispatching. A pipeline tree chains together instance of the FOLLOWING top-level components:

• pipeline pair node
• branch node
• route node or echo node.

A pipeline pair node TIES together a single request and a single response pipeline into one top-level element. Only the request pipeline is executed during request processing, and only the response pipeline is executed when reversing the path for response processing.

To create the request and response paths, request and response pipelines are paired together and organized into a single-rooted tree structure. A branch node allows these pipeline pairs to be executed conditionally, and route nodes at the ends of the branches perform the request and response dispatching. A pipeline tree chains together instance of the following top-level components:

A pipeline pair node ties together a single request and a single response pipeline into one top-level element. Only the request pipeline is executed during request processing, and only the response pipeline is executed when reversing the path for response processing.