Core Concepts

Overview provides a glance view of entire functionality and doesn't go deep into details.
Template is used to parametrize processing logic with different runtime values (email and system properites, engine results, etc.). It is a macro expression that is evaluated to a string at each request processing transaction.
Condition is used to define conditional processing logic. Like template it is a macro expression but it is evaluated to a boolean (true/false).
Engine is a building block of processing logic. It is an abstraction of a precompiled component that implements useful lower-level functionality.
Pipeline brings engines alive. Its main part is a sequence of engines that are executed in turns one after another.
Dimension is the notion intoduced to describe multiplicity of some runtime properties such as recipients, body parts, etc. Multiplicity is handled using "implicit iteration" concept.
Stage is a communication protocol processing stage. Some macros, engines and pipelines may be not applicable at some stages.
Troubleshooting tips and tools help to troubleshoot pipeline execution.