This page describes the ATF mechanism for linking a scholarly commentary to its base text.
ATF commentaries do not need a special protocol: four field designations are always available for dividing commentary lines into different parts:
!qt
!bs
!cm
!zz
each of these elements must be surrounded by white space: instead of [!cm
write !cm [
.
Niek Veldhuis
Niek Veldhuis, 'Base Text and Commentary', Oracc: The Open Richly Annotated Cuneiform Corpus, Oracc, 2019 [http://oracc.museum.upenn.edu/doc/help/editinginatf/commentary/]