The reference space type (from the list of requested types set in the requestedReferenceSpaceTypes property), that was ultimately used by ARVRInterface.initialize when setting up the WebXR session.
Possible values come from url=https://developer.mozilla.org/en-US/docs/Web/API/XRReferenceSpaceTypeWebXR's XRReferenceSpaceType/url. If you want to use a particular reference space type, it must be listed in either requiredFeatures or optionalFeatures.
The reference space type (from the list of requested types set in the requestedReferenceSpaceTypes property), that was ultimately used by ARVRInterface.initialize when setting up the WebXR session. Possible values come from url=https://developer.mozilla.org/en-US/docs/Web/API/XRReferenceSpaceTypeWebXR's XRReferenceSpaceType/url. If you want to use a particular reference space type, it must be listed in either requiredFeatures or optionalFeatures.