RE: Filter Separation using a NULL?

["Nelson, David" <dnelson@enterasys.com>]

Bernard Aboba writes...

>       The String field is one or more octets.  It contains filter
rules
>       in the IPFilterRule syntax defined in [RFC3588] Section 4.3,
with
>       filter rules separated by a NULL (0x00).  A robust
implementation
>       SHOULD support the field as undistinguished octets.

The sentence "A robust implementation SHOULD support the field as
undistinguished octets." is standard in RADIUS documents, achieving the
status of special "words of art". Yet, in this context, I wonder what it
means.  I would think that "undistinguished octets" means the same thing
as "opaque binary blob".  Yet, that clearly can't be the case, as we
anticipate that the attribute contents are a sequence of ASCII strings
delimited by NULs.

So, what exactly does this sentence mean to convey?


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