Is there any order to Server References?

3304 The Server Reference is a UTF-8 Encoded String. The value of this string is a space separated list of
3305 references. The format of references is not specified here.

Is there any order to the list of references if the client chooses to observe the hint? For example, is the list in priority order or can the client pick an arbitrary reference? Is there any guidance that we want to provide in this case?