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diff --git a/doc/database/db_conv.md b/doc/database/db_conv.md
index f70191b88e..69815fae7d 100644
--- a/doc/database/db_conv.md
+++ b/doc/database/db_conv.md
@@ -1,15 +1,35 @@
 Table conv
-==========
-
-| Field   | Description                               | Type             | Null | Key | Default             | Extra           |
-| ------- | ----------------------------------------- | ---------------- | ---- | --- | ------------------- | --------------- |
-| id      | sequential ID                             | int(10) unsigned | NO   | PRI | NULL                | auto_increment  |
-| guid    | A unique identifier for this conversation | varchar(64)      | NO   |     |                     |                 |
-| recips  | sender_handle;recipient_handle            | mediumtext       | NO   |     | NULL                |                 |
-| uid     | user_id of the owner of this data         | int(11)          | NO   | MUL | 0                   |                 |
-| creator | handle of creator                         | varchar(255)     | NO   |     |                     |                 |
-| created | creation timestamp                        | datetime         | NO   |     | 0001-01-01 00:00:00 |                 |
-| updated | edited timestamp                          | datetime         | NO   |     | 0001-01-01 00:00:00 |                 |
-| subject | subject of initial message                | mediumtext       | NO   |     | NULL                |                 |
+===========
+
+private messages
+
+Fields
+------
+
+| Field   | Description                               | Type               | Null | Key | Default             | Extra          |
+| ------- | ----------------------------------------- | ------------------ | ---- | --- | ------------------- | -------------- |
+| id      | sequential ID                             | int unsigned       | NO   | PRI | NULL                | auto_increment |
+| guid    | A unique identifier for this conversation | varbinary(255)     | NO   |     |                     |                |
+| recips  | sender_handle;recipient_handle            | text               | YES  |     | NULL                |                |
+| uid     | Owner User id                             | mediumint unsigned | NO   |     | 0                   |                |
+| creator | handle of creator                         | varchar(255)       | NO   |     |                     |                |
+| created | creation timestamp                        | datetime           | NO   |     | 0001-01-01 00:00:00 |                |
+| updated | edited timestamp                          | datetime           | NO   |     | 0001-01-01 00:00:00 |                |
+| subject | subject of initial message                | text               | YES  |     | NULL                |                |
+
+Indexes
+------------
+
+| Name    | Fields |
+| ------- | ------ |
+| PRIMARY | id     |
+| uid     | uid    |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uid | [user](help/database/db_user) | uid |
 
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