| Description | A single value from an evaluated expression. For a given
instance, only one 'Val' object in the conceptual row will
be instantiated, that is, the one with the appropriate type
for the value. For values that contain no objects of
expObjectSampleType 'deltaValue', reading a value from the
table causes the evaluation of the expression for that
value. For those that contain a 'deltaValue' the value
read is as of the last delta interval.
If in the attempt to evaluate the expression one or more
of the necessary objects is not available, the corresponding
entry in this table is effectively not instantiated.
To maintain security of MIB information, expression
evaluation must take place using security credentials for
the implied Gets of the objects in the expression. For
expressions with no deltaValue those security credentials
are the ones that came with the Get* for the value. For
expressions with a deltaValue the ongoing expression
evaluation is under the security credentials of the
creator of the corresponding expNameEntry. |