+ <field>
+ <name>created_id</name>
+ <type>int unsigned</type>
+ <title>Created By Contact ID</title>
+ <comment>FK to civicrm_contact, who uploaded this file</comment>
+ <add>5.3</add>
+ </field>
+ <foreignKey>
+ <name>created_id</name>
+ <table>civicrm_contact</table>
+ <key>id</key>
+ <add>5.3</add>
+ <onDelete>SET NULL</onDelete>
+ </foreignKey>