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diff --git a/doc/database/db_post-thread.md b/doc/database/db_post-thread.md
index aca05c1e2a..b90fb2ab55 100644
--- a/doc/database/db_post-thread.md
+++ b/doc/database/db_post-thread.md
@@ -1,17 +1,46 @@
 Table post-thread
 ===========
+
 Thread related data
 
-| Field | Description | Type | Null | Key | Default | Extra |
-| ----- | ----------- | ---- | ---- | --- | ------- | ----- |
-| uri-id    | Id of the item-uri table entry that contains the item uri                                               | int unsigned | NO  | PRI | NULL                |  |    
-| owner-id  | Item owner                                                                                              | int unsigned | NO  |     | 0                   |  |    
-| author-id | Item author                                                                                             | int unsigned | NO  |     | 0                   |  |    
-| causer-id | Link to the contact table with uid=0 of the contact that caused the item creation                       | int unsigned | YES |     | NULL                |  |    
-| network   |                                                                                                         | char(4)      | NO  |     |                     |  |    
-| created   |                                                                                                         | datetime     | NO  |     | 0001-01-01 00:00:00 |  |    
-| received  |                                                                                                         | datetime     | NO  |     | 0001-01-01 00:00:00 |  |    
-| changed   | Date that something in the conversation changed, indicating clients should fetch the conversation again | datetime     | NO  |     | 0001-01-01 00:00:00 |  |    
-| commented |                                                                                                         | datetime     | NO  |     | 0001-01-01 00:00:00 |  |    
+Fields
+------
+
+| Field           | Description                                                                                             | Type         | Null | Key | Default             | Extra |
+| --------------- | ------------------------------------------------------------------------------------------------------- | ------------ | ---- | --- | ------------------- | ----- |
+| uri-id          | Id of the item-uri table entry that contains the item uri                                               | int unsigned | NO   | PRI | NULL                |       |
+| conversation-id | Id of the item-uri table entry that contains the conversation uri                                       | int unsigned | YES  |     | NULL                |       |
+| owner-id        | Item owner                                                                                              | int unsigned | NO   |     | 0                   |       |
+| author-id       | Item author                                                                                             | int unsigned | NO   |     | 0                   |       |
+| causer-id       | Link to the contact table with uid=0 of the contact that caused the item creation                       | int unsigned | YES  |     | NULL                |       |
+| network         |                                                                                                         | char(4)      | NO   |     |                     |       |
+| created         |                                                                                                         | datetime     | NO   |     | 0001-01-01 00:00:00 |       |
+| received        |                                                                                                         | datetime     | NO   |     | 0001-01-01 00:00:00 |       |
+| changed         | Date that something in the conversation changed, indicating clients should fetch the conversation again | datetime     | NO   |     | 0001-01-01 00:00:00 |       |
+| commented       |                                                                                                         | datetime     | NO   |     | 0001-01-01 00:00:00 |       |
+
+Indexes
+------------
+
+| Name            | Fields          |
+| --------------- | --------------- |
+| PRIMARY         | uri-id          |
+| conversation-id | conversation-id |
+| owner-id        | owner-id        |
+| author-id       | author-id       |
+| causer-id       | causer-id       |
+| received        | received        |
+| commented       | commented       |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uri-id | [item-uri](help/database/db_item-uri) | id |
+| conversation-id | [item-uri](help/database/db_item-uri) | id |
+| owner-id | [contact](help/database/db_contact) | id |
+| author-id | [contact](help/database/db_contact) | id |
+| causer-id | [contact](help/database/db_contact) | id |
 
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