You guessed right: I create the xmltv file on another machine and push it to the low spec NAS, where tvheadend is running, which in turn gets the tv channels from a sat>ip server.
By the way, I am wondering already for some time, why there is a configure switch for hdhomerun in tvheadend. I always assumed that hdhomerun worked similar to sat>ip!? Do you know the reason for it? But let's get back to the epg:
At least for the beginning, I will continue with using tv_grab_file to import the xmltv file, with the differnce that it will be generated by the tv_grab_zz_sdjson_sqlite tool.
Thanks for the quote of the the epg. There is a small mistake into the episode number; it says 6/7, but a season of Once upon a time has more than 20 episodes, not 7. I looked up the xmltv_ns when I adapted the output of webgrab+; it is zerobased episode-number / number of episode in the season . zerobased season number . part number
I can cope if the description is not in italian; for tv shows, I am mainly interested in the season and episode information. I will probably getting around trying the test account tomorrow or the day after it.
Finally, thank you also for the tip in your previous message about downloading only 10 days in advance because some events do not have all the details yet 14 days in advance.