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.