| uid | | int(10) unsigned | NO | MUL | 0 | |
| contact-id | | int(11) unsigned | NO | | 0 | |
| gcontact-id | Global Contact | int(11) unsigned | NO | | 0 | |
-| created | | datetime | NO | MUL | 0000-00-00 00:00:00 | |
-| edited | | datetime | NO | | 0000-00-00 00:00:00 | |
-| commented | | datetime | NO | MUL | 0000-00-00 00:00:00 | |
-| received | | datetime | NO | | 0000-00-00 00:00:00 | |
-| changed | | datetime | NO | | 0000-00-00 00:00:00 | |
+| owner-id | Item owner | int(11) unsigned | NO | MUL | 0 | |
+| author-id | Item author | int(11) unsigned | NO | MUL | 0 | |
+| created | | datetime | NO | MUL | 0001-01-01 00:00:00 | |
+| edited | | datetime | NO | | 0001-01-01 00:00:00 | |
+| commented | | datetime | NO | MUL | 0001-01-01 00:00:00 | |
+| received | | datetime | NO | | 0001-01-01 00:00:00 | |
+| changed | | datetime | NO | | 0001-01-01 00:00:00 | |
| wall | | tinyint(1) | NO | MUL | 0 | |
| private | | tinyint(1) | NO | | 0 | |
| pubmail | | tinyint(1) | NO | | 0 | |