How an application program sends a NULL value to CMIP services

An application program can send a NULL value to CMIP services in any of the following forms:


>>-+-------+--+-null----------------+--------------------------><
   '-label-'  +-NULL----------------+   
              |       (1)           |   
              +-value---------------+   
              |          (1)        |   
              +-variable------------+   
              |              (2)    |   
              '-<--hex value------>-'

Notes:

Variables specified in this position must resolve to NULL.
When specifying a value in this format, remember that the BER representation of a NULL consists only of a tag and length field that indicates tha the length is zero. Therefore, the proper representation of hexadecimal BER should be "<>".

An application program can specify a NULL value by specifying:

The character string NULL
An ASN.1 value label that resolves to a NULL value
A MIB variable that resolves to a NULL value