Ron
-----Original Message-----
From: owner-ietf-ldapbis@OpenLDAP.org
[mailto:owner-ietf-ldapbis@OpenLDAP.org]On Behalf Of Steven Legg
Sent: Thursday, 11 November 2004 16:21
To: Kurt D. Zeilenga
Cc: ietf-ldapbis@OpenLDAP.org
Subject: Re: reframing the Empty IA5 string discussion
Kurt,
Kurt D. Zeilenga wrote:
I see that there are few reasonable options here:
1) IA5 strings precludes zero-length values
2) IA5 strings allows zero-length values
2A) a zero-length values only matches a zero-length value
2B) a zero-length value matches " " (and all values
equivalent to " ").
I prefer 1 over 2A over 2B (see prior posts for why).
There are two separate questions here. Whether or not the IA5 String syntax
is restricted to preclude zero-length values (I don't care either way) there
is still the potential for zero-length IA5String values to be compared by
caseIgnoreIA5Match through component matching. 2A versus 2B still has to be
addressed. On that score I prefer 2B as it makes more sense when taking the
limit.
caseIgnoreIA5Match says " foo" and "foo" are equal
caseIgnoreIA5Match says " fo" and "fo" are equal
caseIgnoreIA5Match says " f" and "f" are equal
2B says " " and "" are equal
2A says they're not - that seems odd to me!
Regards,
Steven
(Regardless of the choice LDAPprep can and should be designed
to be idempotent.)