Fundamental facet: ordered

In XML Schema Part 2:

4.2.2.1 The ordered Schema Component
...
When {variety} is ·union·, if {value} is true for every member of {member
type definitions} and all members of {member type definitions} share a
common ancestor, then {value} is true; else {value} is false.

The {value} of the "ordered" facet can be "partial" or "total", not "true".

Regards,
Panagiotis