function. The "sync chain" is the set of event-* modules. At the moment there
is only one module at each stage. However, as more module are added, it will
become relevant to have many modules at the same stage simultaneously. This
-will require some modifications. I've kept this possibility at the back of my
-mind while designing. It is already partly supported at the matching stage
-through encapsulation of other matching modules.
+will require some modifications. It is already partly supported at the
+matching stage through encapsulation of other matching modules.
+
+sync_chain_unitest:main() provides a fairly simple example of sync chain
+implementation.
++ Stage 1: Event processing
Specific to the tracing data source.