Modify the XML Content on Save

You can add a listener that notifies you before the user saves an XML document. Then if the XML document is opened in the Author visual editing mode you can use the Author API to change attributes before the save takes place:

      @Override
      public void applicationStarted
(final StandalonePluginWorkspace pluginWorkspaceAccess) {
       pluginWorkspaceAccess.addEditorChangeListener
(new WSEditorChangeListener(){
         //An editor was opened
        @Override
        public void editorOpened(URL editorLocation) {
          final WSEditor editorAccess = pluginWorkspaceAccess.getEditorAccess
(editorLocation, PluginWorkspace.MAIN_EDITING_AREA);
          if(editorAccess != null){
            editorAccess.addEditorListener
(new ro.sync.exml.workspace.api.listeners.WSEditorListener(){
              //Editor is about to be saved
              @Override
              public boolean editorAboutToBeSavedVeto(int operationType) {
                if(EditorPageConstants.PAGE_AUTHOR.equals
(editorAccess.getCurrentPageID())){
                  WSAuthorEditorPage authorPage = 
(WSAuthorEditorPage) editorAccess.getCurrentPage();
                  AuthorDocumentController controller = 
authorPage.getDocumentController();
                  try {
                    //Find the revised element
                    AuthorNode[] nodes = controller.findNodesByXPath
("//revised", true, true, true);
                    if(nodes != null && nodes.length > 0){
                      AuthorElement revised = (AuthorElement) nodes[0];
                      //Set the modified attribute to it...
                      controller.setAttribute("modified", 
new AttrValue(new Date().toString()), revised);
                    }
                  } catch (AuthorOperationException e) {
                    e.printStackTrace();
                  }
                }
                //And let the save continue.. 
                return true;
              }
            });
          }
        }
       }, PluginWorkspace.MAIN_EDITING_AREA); 
      }