xlink:href='#ref'/><title>Referred by main_detail ( object_id -> gid ) </title></a>
  <a xlink:href='#survey_gid'><text x='288' y='112'>survey_gid</text><text x='416' y='112' class='colType'>integer</text><title>survey_gid integer
Identifier for the survey</title></a>
  <a xlink:href='#description'><text x='288' y='127'>description</text><text x='387' y='127' class='colType'>varchar(254)</text><title>description varchar&#040;254&#041;
Textual description of the object</title></a>
  <a xlink:href='#source'><