Global Ids

   /**
     *  Creates a new <code>BasicId</code> using the "url" namespace.
     *
     *  @param authority the authority for this Id
     *  @param identifier the identifier for this Id
     *  @throws org.osid.NullArgumentException null argument provided
     */

    public GlobalURLId(String authority, String identifier);

    /**
     *  Returns an Id from a string representation of a URL.
     *
     *  @param url the string to be parsed
     *  @return an Id with the string components
     *  @throws org.osid.InvalidArgumentException string could not be parsed
     *  @throws org.osid.NullArgumentException str is null
     */

    public static org.osid.id.Id valueOf(String surl)

    /**
     *  Returns an Id from a Java URL.
     *
     *  @param url the url
     *  @throws org.osid.InvalidArgumentException url could not be parsed
     *  @throws org.osid.NullArgumentException str is null
     */

    public static org.osid.id.Id valueOf(java.net.URL url)