The value of the object tmnxWppStatsType indicates
the instance identifier of the statistics
contained in this conceptual row.
Together with the value of tmnxWppStatsType it indicates
unambiguously what the value of tmnxWppStatsVal means.
For example: if the value of the object tmnxWppStatsType is equal
to 'event', the value of tmnxWppStatsInstance indicates
the identifier of the type of event that this conceptual row
refers to, for example 'noResources',
and the value of tmnxWppStatsVal indicates the number
of times a 'no resources' event occurred for this WPP portal.