Thanks for the input.
A good idea to put the demo in a separate repo
It is just not directly obvious from OEX
works fine, and module.xml looks good. Review placed 

trx this Docs  %ETN for Error Logging

>> Naming in ObjectScript has a historic background 
In the beginning, the grand-grandfather of IRIS was a full-stack operating system
And it was running on machines with only 64 KBytes of memory
So saving space in memory was the highest virtue of a developer then.
Consequently, all names were as short as short could be.
Typically using single-character named variables.
And A was different from a to widen the available scope
Over the years, this was kept for backward compatibility and to decrease the fear of upgrades
And I have seen customers running 40+ year old code also in IRIS without any bit changed.