code: @Nonnull
    public static SchematronResourcePure fromURL (@Nonnull @Nonempty final String sSCHURL) throws MalformedURLException
    {
      return new SchematronResourcePure (new URLResource (sSCHURL));
    }
docs: Create a new {@link SchematronResourcePure} from Schematron rules provided
  at a URL
  
  @param sSCHURL
  The URL to the Schematron rules. May neither be <code>null</code>
  nor empty.
  @return Never <code>null</code>.
  @throws MalformedURLException
  In case an invalid URL is provided