Ordered Collections (1)
3.2.1 Ordering is sufficiently standardized that different applications and servers can operate on the same ordering without private agreements.
3.2.7 It is possible to order the members of a collection in a client-specified way, not necessarily based on property values.
3.2.2 A collection is not required to be ordered.
3.2.3 The semantics of an ordering are discoverable.