The Item Mapper is a tool in the DSpace web user interface allowing repository managers to display the same item in multiple collections at once. Thanks to this feature, a repository manager is not forced to duplicate items to display them in different collections
In the XML User Interface, the item mapper can be accessed from the "Context" menu from a collection homepage.
In the JSP User Interface, the item mapper can be accessed from the "Admin Tools" menu on the right side of a collection homepage.
Item Mapper - JSPUI Interface
Item Mapper - XMLUI Interface