Re: Case sensitivity summary

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Andrew Findlay wrote:
> We are not going to define a standard that forces everyone to do everyt=
hing
> 'right' while providing interworking of differing systems. It is simply=

> not possible.

That perfectly summarizes this topic.
Thanks Andrew, for this clear statement.

Let's keep the scope right.

> Overall I think we are heading for something like this:
>=20
> 1)	Usernames and groupnames should have caseIgnoreMatch syntax
>=20
> 2)	Usernames and groupnames should preferably be stored in lower-case i=
n
> 	cultures where that has meaning. Remember that LDAP is case-preserving=

> 	even for case-insensitive attributes.
>=20
> 3)	Systems that are internally case-sensitive should take extra care
> 	when using data from LDAP.
>=20
> I know this conflicts with Mark's wish to be able to import existing
> NIS data unchanged to cope with weird existing situations, but I see th=
at=20
> as a special case that may be better handled in another way.

+1 !!!

(That's pretty much exactly what I planned to suggest.)

> Note that the above discussion *only* applies to usernames and groupnam=
es.
> Unix-specific mappings such as automount maps are a different issue.

automount maps are maybe a similar topic like generating 'homeDirectory' =
values
for $HOME on case-sensitive file-systems based on user names.  For this
RECOMMENDing that usernames are normalized to lower-case is really helpfu=
l.

Regarding service names:

(Personally I never saw any customer LDAP deployment storing a services m=
ap.)

1. Service names are used in DNS RRs (SRV, DANE, etc.) and those DNS labe=
ls are
definitely supposed to be treated case-insensitive.

2. Jordan pointed out RFC 6335.

=3D> I concur with Jordan: Service names MUST be treated case-insensitive=
=2E
Probably recommending in an implementation note to normalize values to
lower-case seems also to be a good idea.

=3D> People actually using case-sensitive service names to address *diffe=
rent*
services MUST clean up their local mess. But they likely have to do that =
anyway.

Ciao, Michael.



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