PBS XML Schema Version 3.1.9
      
      Pattern db.xlink.show.enumeration
      Defined in PBS XML Schema grammar.
      This pattern may contain:
      One of the following:
      
         new
         An application traversing to the ending resource should load it in a new window, frame,
         pane, or other relevant presentation context.
         replace
         An application traversing to the ending resource should load the resource in the same
         window, frame, pane, or other relevant presentation context in which the starting
         resource was loaded.
         embed
         An application traversing to the ending resource should load its presentation in place
         of the presentation of the starting resource.
         other
         The behavior of an application traversing to the ending resource is unconstrained
         by XLink. The application should look for other markup present in the link to determine
         the appropriate behavior.
         none
         The behavior of an application traversing to the ending resource is unconstrained
         by this specification. No other markup is present to help the application determine
         the appropriate behavior.