Getting inside <?dctmEditor selectedObject=090181cd800031

1

Does anyone know how I can pull out the selectedObject using standard xpath? The full string is:

<?dctmEditor selectedObject=090181cd800031db?><?dctmLink chronic_id='090181cd800031db' object_id='090181cd800031db' edit_widget_type=graphic?>./images/34341a-2.jpg