Greenstone 3 feature. Only partially developed.

To enable this, (from 22 Feb 2022):

• set servlet param:

         <init-param>
          <param-name>documentbasket</param-name>
          <param-value>true</param-value>
        </init-param>

• Login as admin (or someone with editing rights?), make sure editing mode is enabled (by navigating to a document and clicking the dropdown menu until the admin button at the top)
• set documentbasket=on as a cgi param.