code: @Pure
  	public static URL readResourceURL(Element node, XMLResources resources, String... path) {
  		final String stringValue = getAttributeValue(node, path);
  		if (XMLResources.isStringIdentifier(stringValue)) {
  			try {
  				final long id = XMLResources.getNumericalIdentifier(stringValue);
  				return resources.getResourceURL(id);
  			} catch (Throwable exception) {
  				//
  			}
  		}
  		return null;
  	}
docs: Replies the resource URL that is contained inside the XML attribute
  defined in the given node and with the given XML path.
  
  @param node is the XML node to read.
  @param resources is the collection of resources to read.
  @param path is the XML path, relative to the node, of the attribute. The last
  element of the array is the name of the attribute.
  @return the resource URL, or <code>null</code> if it cannot be retrieved.