NodeInfo/@JobPriority has a default of 50
QueueSubmissionParams/@Priority has a default of 1.
QueueSubmissionParams/@Priority also states:
Exactly one of @NextQueueEntryID, @PrevQueueEntryID or
@Priority SHALL be specified.
Since a default is the same as being present, this effectively outlaws NextQueueEntryID and PrevQueueEntryID
Table 7.75: QueueSubmissionParams Element
|Priority ? = "1"||...||...
Modification Note: @Priority previously had a default="1". This default is erroneous and has been removed because it conflicts with the default of NodeInfo/@JobPriority="50" and because @NextQueueEntryID and @PrevQueueEntryID could never be specified without violating the restriction the @Priority is not specified.