fa'o FAhO cmavo

unconditional end of text; outside regular grammar; used for computer input.

On affix form:

fanmo
x1 is an end/finish/termination of thing/process x2; [not necessarily implying completeness].

In notes:

jo'au
change version/dialect of parser
sa'oi
unconditional start of text; outside regular grammar; used for computer input.
uencu
x1 (entity) is a document with content x2 (entity)
zo si si zei fa'o
x1 is a nonsense zei-lujvo using parts x2, silly by standard x3.