| Description | An object prefix to assist an application in determining
the instance indexing to use in expValueTable, relieving the
application of the need to scan the expObjectTable to
determine such a prefix.
See expObjectTable for information on wildcarded objects.
If the expValueInstance portion of the value OID may
be treated as a scalar (that is, normally, 0) the value of
expExpressionPrefix is zero length, that is, no OID at all.
Otherwise expExpressionPrefix is the value of any wildcarded
instance of expObjectID for the expression. This is
sufficient as the remainder, that is, the instance fragment
relevant to instancing the values must be the same for all
wildcarded objects in the expression. |