[section {Grammar Container}]

[include whatis_container.inc]
[para]

It has no direct formal specification beyond what was said above.

[subsection Example]

Assuming the following PEG for simple mathematical expressions

[para]
[include ../example/expr_peg.inc]
[para]

one possible CONTAINER serialization for it is

[para]
[include ../example/expr_container.inc]
[para]