Semantic MediaWiki/data/smw rels2

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  • Version: 1.7
  • Documentation status: unofficial; confirmed only by testing
  • Purpose: defines semantic relationships between property-names and property-values, where the values have an SMW ID
  • Foreign keys: smw_ids.smw_id
  • Fields:
    • s_id: SMW ID of a page on which the property name-value pair is defined
    • p_id: SMW ID of the property name
    • o_id: SMW ID of the property value


<mysql>CREATE TABLE `smw_rels2` (

 `s_id` int(8) unsigned NOT NULL,
 `p_id` int(8) unsigned NOT NULL,
 `o_id` int(8) unsigned DEFAULT NULL,
 KEY `s_id` (`s_id`),
 KEY `p_id` (`p_id`),
 KEY `o_id` (`o_id`)

) ENGINE=InnoDB DEFAULT CHARSET=binary;</mysql>


<mysql> SELECT s_id

 , s.smw_namespace AS s_namespace
 , CAST(s.smw_title AS char) AS s_title
 , CAST(p.smw_title AS char) AS p_title
 , CAST(o.smw_title AS char) AS o_title
   ((smw_rels2 AS r
   LEFT JOIN smw_ids AS s ON r.s_id=s.smw_id)
   LEFT JOIN smw_ids AS p ON r.p_id=p.smw_id)
   LEFT JOIN smw_ids AS o ON r.o_id=o.smw_id;