Manual:Iwlinks table

The iwlinks table stores the interwiki links with their targets.

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 * Field     | Type             | Null | Key | Default | Extra |
 * iwl_from  | int(10) unsigned | NO   | PRI | 0       |       |
 * iwl_prefix | varbinary(20)   | NO   | PRI |         |       |
 * iwl_title | varbinary(255)   | NO   | PRI |         |       |

iwl_from is the  of the referring page (i.e. the local page that the link appears on).

iwl_prefix is interwiki prefix code of the target; this is used the same way as a namespace is used when editing.

iwl_title is the title of the target page, including namespace.