Re: Empty IA5String

[Leif Johansson <leifj@it.su.se>]

>
> I can give you what might have become a real-world example at our site
> if Directory Strings could be zero-length:  A 'vacation message'
> attribute which the mail system would check.  If the attribute was
> present, the mail system would send a vacation message in response to
> incoming messages, with a standard initial text + the optional
> user-supplied message.
>
> As it is, we ended up another boolean attribute which means 'there is an
> active vacation message', and only use the vacation attribute if the
> boolean is TRUE.
>

I'd say the typical solution is that the attribute is an optional 
attribute of an objectClass indicating the function of a vacation
message. The filter is then objectClass=something rather than the
presence-filter based on the vaction attribute.

	MVH leifj