Re: Case Ignore Ordering matching rule for IA5 String sysntax ?

[masarati@aero.polimi.it]

> Hi !
>
>    We are trying to define (in our own ldap schema) an IA5String attribute
> type that
> is required to be managed (from our ldap clients) as "case insensitive"
>
>    "greaterOrEqual" and "lessOrEqual" filters are required to be managed
> over this
> attribute, so we wanted to assigne (in its attribute type definition) an
> ORDERING
> matching requesting "case insensitive" behaviour
>
>    According to RFC4517 (http://tools.ietf.org/html/rfc4517) there is NO
> any
> ordering Matching Rule for IA5String syntax AND case insensitive support.
> We
> tried with the "caseIgnoreOrderingMatch" .. but slapd returns and error
> (at schema
> loading) as attribute type syntax (IA5String) is not allowed for this
> "ordering match rule"

Correct.

>    We checked that defining the attribute as "PrintableString"  works (as
> "caseIgnoreOrderingMatch"
> is a valid matching rule for that sysntax according to RFC4517) ... but we
> are really interested in
> IA5String syntax ....
>
>    Does openLDAP server technolgy provide a "case insensitive ordering
> match" method
> for IA5String syntax ?

No.  It doesn't because there's no standard track definition for it. 
However, there's nothing preventing OpenLDAP software from supporting this
non-standard track feature.  Adding custom matching rules is relatively
"trivial".

p.