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diff --git a/doc/database/db_post-thread.md b/doc/database/db_post-thread.md
index 301a16a66f..96fd0d4275 100644
--- a/doc/database/db_post-thread.md
+++ b/doc/database/db_post-thread.md
@@ -1,17 +1,43 @@
 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 | YES | PRI |  |  |    
-| owner-id | Item owner | int unsigned | YES |  | 0 |  |    
-| author-id | Item author | int unsigned | YES |  | 0 |  |    
-| causer-id | Link to the contact table with uid=0 of the contact that caused the item creation | int unsigned | NO |  |  |  |    
-| network |  | char(4) | YES |  |  |  |    
-| created |  | datetime | YES |  | 0001-01-01 00:00:00 |  |    
-| received |  | datetime | YES |  | 0001-01-01 00:00:00 |  |    
-| changed | Date that something in the conversation changed, indicating clients should fetch the conversation again | datetime | YES |  | 0001-01-01 00:00:00 |  |    
-| commented |  | datetime | YES |  | 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                |       |
+| 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    |
+| 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 |
+| 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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