Comments start with a pound sign (#) and extend to the end of the line. Example:
# This is a comment
Note that comments are not allowed within some blocks.
It is common for this header to appear in DeHackEd files which pre-date the DOOM source release:
Patch File for DeHackEd v3.0 # Note: Use the pound sign ('#') to start comment lines. Doom version = 21 Patch format = 6
To include a DEH or BEX file in another one, put one or more of the following lines in your BEX file:
INCLUDE filename INCLUDE NOTEXT filename
The NOTEXT directive will skip any DeHackEd-style text blocks in the included file.