title 2007-09-18T12:12:12-07:00 James Snell tag:example.org,2007:/foo Title tag:example.org,2007:/foo/1 2007-09-18T12:12:12-07:00 A feed reader will pass this test if it can properly resolve the Base URI for all of the relative references. Because Content-Location is not used, the Request URI should be used as the Base URI.