| [contact-relation](help/database/db_contact-relation) | Contact relations |
| [conv](help/database/db_conv) | private messages |
| [delayed-post](help/database/db_delayed-post) | Posts that are about to be distributed at a later time |
+| [delivery-queue](help/database/db_delivery-queue) | Delivery data for posts for the batch processing |
| [diaspora-contact](help/database/db_diaspora-contact) | Diaspora compatible contacts - used in the Diaspora implementation |
| [diaspora-interaction](help/database/db_diaspora-interaction) | Signed Diaspora Interaction |
| [endpoint](help/database/db_endpoint) | ActivityPub endpoints - used in the ActivityPub implementation |