modified timestamp /* comment 'date this record was modified' */,\r
reply_to integer /* comment 'notice replied to (usually a guess)' */ references notice (id) ,\r
is_local integer default 0 /* comment 'notice was generated by a user' */,\r
- source varchar(32) /* comment 'source of comment, like "web", "im", or "clientname"' */\r
+ source varchar(32) /* comment 'source of comment, like "web", "im", or "clientname"' */,\r
+ conversation integer /*id of root notice in this conversation' */ references notice (id)\r
\r
\r
/* FULLTEXT(content) */\r