Hi Stephen and others,
Thanks for solving my previous "unknown database" problem. Now I got some "The server time zone value 'EDT' is unrecognized..." error message after I execute the following command,
stardog-admin virtual add music.properties music_mappings.ttl
I searched on internet and found some suggestion of specify the serverTimezone explicitly with the following,
But where should I add the above specification to? By the way, my ubuntu uses EDT timezone and my mysql uses system time, so the timezone shouldn't be a problem. Hope you can give me some suggestions.