`uid` mediumint unsigned NOT NULL COMMENT 'User id',
`label` varchar(64) NOT NULL COMMENT 'Channel label',
`description` varchar(64) COMMENT 'Channel description',
+ `circle` int COMMENT 'Circle or channel that this channel is based on',
`access-key` varchar(1) COMMENT 'Access key',
`include-tags` varchar(255) COMMENT 'Comma separated list of tags that will be included in the channel',
`exclude-tags` varchar(255) COMMENT 'Comma separated list of tags that aren\'t allowed in the channel',