How an application program specifies ANY DEFINED BY values

The following example shows how the ASN.1 syntax might define an ANY DEFINED BY value.

    A ::= INTEGER
    B ::= BIT STRING
    C ::= BOOLEAN
 
    X ::= SEQUENCE
          {
              a INTEGER,
              b ANY DEFINED BY a --% ANY_TABLE_REF (Y)
          }
--% Y ANY_TABLE ::=
--%       {
--%           1  A,
--%           2  B,
--%           3  C
--%       }

Given this ASN.1, if one wanted to have member b of type X be a bit string, field a must have a value of 2 (as defined by the ANY DEFINED BY resolution table Y). Therefore, an application program formats and sends to CMIP services the following:

Figure 1. Defining a bit string field