HashMap map = new HashMap();
map.put(IMarker.LINE_NUMBER, new Integer(myFile));
map.put(IWorkbenchPage.EDITOR_ID_ATTR,
"org.eclipse.wst.xml.ui.internal.tabletree.XMLMultiPageEditorPart");
IMarker marker = file.createMarker(IMarker.TEXT);
marker.setAttributes(map);
//page.openEditor(marker); //2.1 API
IDE.openEditor(activePage, marker);
}