SmartOne Application support multiple playlist format, and of course it support EPG via XMLTV file.
for XC playlist and similar panels the EPG is supported via the API provided by the panel, and no extra field is required.
for NORMAL playlist, the EPG is supported via a provided XMLTV link, either should be set on the add playlist page on the EPG source field, or via the TAG url-tvg (x-tvg-url also supported).