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Re: Empty IA5String

Steven Legg writes:
>Hallvard B Furuseth wrote:
>>[Syntaxes] section 3.3.15 says an IA5 String may be empty.
>> 
>> Why is that, when Directory String and Printable String may not?
> 
> The Directory String and Printable String syntaxes derive from syntaxes
> in X.520 that have been constrained to have at least one character.
> The IA5 String syntax does not have a counterpart in X.520 so it doesn't
> need to be constrained for interoperability reasons.
> (...)
> The working group needs to decide whether to restrict IA5 String to at
> least one character, or to allow empty strings to compare true.

My vote from an LDAP viewpoint would be minimal change, i.e. do not
disallow empty IA5 Strings.

OTOH, if an X.500 implementor wants to support IA5 String, maybe the
reason why X.500 requires 1+ characters in the other string syntaxes,
also would make the same restriction preferable in IA5 String?

-- 
Hallvard