code: public static String propertyTagAction(
          String property,
          String action,
          String defaultValue,
          boolean escape,
          ServletRequest req)
      throws CmsException {
  
          return propertyTagAction(property, action, defaultValue, escape, req, null);
      }
docs: Internal action method.<p>
  
  @param property the property to look up
  @param action the search action
  @param defaultValue the default value
  @param escape if the result html should be escaped or not
  @param req the current request
  
  @return the value of the property or <code>null</code> if not found (and no defaultValue was provided)
  
  @throws CmsException if something goes wrong