perl-ldap-dev

schema attributes method

[Justin <da...@io...>]

Greetings!


I am using version 0.22 of the perl library and Netscape Directory Server 
version 4.12.  Whenver I retrieve the list of attributes using something like:

      my $schema = $ldap->schema("cn=Schema");
      my @atts = $schema->attributes();

the array returned from attributes() is all upper case.  However, the values
returned from the MUST and MAY listings for an object class, obtained by:

      my @may = $schema->item($oid, "may");

Returns a listing that is in Mixed Case, as it is returned from the directory.


Can anyone explain why $schema->attributes does not return a mixed case
listing?


Thanks!

Justin

Re: schema attributes method

[Chris R. <chr...@me...>]

Justin <da...@io...> wrote:
> Greetings!
> 
> 
> I am using version 0.22 of the perl library and Netscape Directory Server 
> version 4.12.  Whenver I retrieve the list of attributes using something
> like:
> 
>       my $schema = $ldap->schema("cn=Schema");
>       my @atts = $schema->attributes();
> 
> the array returned from attributes() is all upper case.  However, the
> values returned from the MUST and MAY listings for an object class,
> obtained by:
> 
>       my @may = $schema->item($oid, "may");
> 
> Returns a listing that is in Mixed Case, as it is returned from the
> directory.
> 
> 
> Can anyone explain why $schema->attributes does not return a mixed case
> listing?

Attribute names are of course not case-sensitive, so returning them in all
upper-case does not really matter.

But it is curious that it is inconsistent between the calls. Possibly the
attributes() call is returning the names after they've been internally
canonicalized, and the item call isn't. I think I can see this being done
in the _fixup_entry routine. Well, there are a bunch of calls to 'uc' in
there which weren't in the Schema module in perl-ldap 0.20, which returns
mixed case attributes from both calls.

Does calling $schema->item($oid) return upper- or lower-case stuff?

Cheers,

Chris

Re: schema attributes method

[Justin <da...@io...>]

On Fri, Feb 02, 2001 at 08:40:28AM -0000, Chris Ridd wrote:
> Justin <da...@io...> wrote:
> > Greetings!
> > 
> > 
> > I am using version 0.22 of the perl library and Netscape Directory Server 
> > version 4.12.  Whenver I retrieve the list of attributes using something
> > like:
> > 
> >       my $schema = $ldap->schema("cn=Schema");
> >       my @atts = $schema->attributes();
> > 
> > the array returned from attributes() is all upper case.  However, the
> > values returned from the MUST and MAY listings for an object class,
> > obtained by:
> > 
> >       my @may = $schema->item($oid, "may");
> > 
> > Returns a listing that is in Mixed Case, as it is returned from the
> > directory.
> > 
> > 
> > Can anyone explain why $schema->attributes does not return a mixed case
> > listing?
> 
> Attribute names are of course not case-sensitive, so returning them in all
> upper-case does not really matter.
> 
> But it is curious that it is inconsistent between the calls. Possibly the
> attributes() call is returning the names after they've been internally
> canonicalized, and the item call isn't. I think I can see this being done
> in the _fixup_entry routine. Well, there are a bunch of calls to 'uc' in
> there which weren't in the Schema module in perl-ldap 0.20, which returns
> mixed case attributes from both calls.
> 
> Does calling $schema->item($oid) return upper- or lower-case stuff?

Calling $schema->item($att, "name") returns mixed case, which is what I want.
(where $att is one of @att, returned from $schema->attributes()).

However!

The Netscape Directory Server 4.12 has multiple attributetype entries for
a given OID.  "cn" and "CommonName" for example, share an OID.  I believe
this is allowed as per rfc2251 section 4.1.4.

So calling $schema->item($att, "name"), while it returns a mixed case name
as I like, will only ever return "CommonName" and never "cn" (or both).


Justin






> 
> Cheers,
> 
> Chris

Re: schema attributes method

[Chris R. <chr...@me...>]

Justin <da...@io...> wrote:
> On Fri, Feb 02, 2001 at 08:40:28AM -0000, Chris Ridd wrote:
>> Justin <da...@io...> wrote:
>> > Greetings!
>> > 
>> > 
>> > I am using version 0.22 of the perl library and Netscape Directory
>> > Server  version 4.12.  Whenver I retrieve the list of attributes using
>> > something like:
>> > 
>> >       my $schema = $ldap->schema("cn=Schema");
>> >       my @atts = $schema->attributes();
>> > 
>> > the array returned from attributes() is all upper case.  However, the
>> > values returned from the MUST and MAY listings for an object class,
>> > obtained by:
>> > 
>> >       my @may = $schema->item($oid, "may");
>> > 
>> > Returns a listing that is in Mixed Case, as it is returned from the
>> > directory.
>> > 
>> > 
>> > Can anyone explain why $schema->attributes does not return a mixed case
>> > listing?
>> 
>> Attribute names are of course not case-sensitive, so returning them in
>> all upper-case does not really matter.
>> 
>> But it is curious that it is inconsistent between the calls. Possibly the
>> attributes() call is returning the names after they've been internally
>> canonicalized, and the item call isn't. I think I can see this being done
>> in the _fixup_entry routine. Well, there are a bunch of calls to 'uc' in
>> there which weren't in the Schema module in perl-ldap 0.20, which returns
>> mixed case attributes from both calls.
>> 
>> Does calling $schema->item($oid) return upper- or lower-case stuff?
> 
> Calling $schema->item($att, "name") returns mixed case, which is what I
> want. (where $att is one of @att, returned from $schema->attributes()).
> 
> However!
> 
> The Netscape Directory Server 4.12 has multiple attributetype entries for
> a given OID.  "cn" and "CommonName" for example, share an OID.  I believe
> this is allowed as per rfc2251 section 4.1.4.

Yes. Attributes have zero or more names.

> So calling $schema->item($att, "name"), while it returns a mixed case name
> as I like, will only ever return "CommonName" and never "cn" (or both).

Cheers,

Chris

Re: schema attributes method

[Justin <da...@io...>]

> >> Does calling $schema->item($oid) return upper- or lower-case stuff?
> > 
> > Calling $schema->item($att, "name") returns mixed case, which is what I
> > want. (where $att is one of @att, returned from $schema->attributes()).
> > 
> > However!
> > 
> > The Netscape Directory Server 4.12 has multiple attributetype entries for
> > a given OID.  "cn" and "CommonName" for example, share an OID.  I believe
> > this is allowed as per rfc2251 section 4.1.4.
> 
> Yes. Attributes have zero or more names.

Thanks for the clarification.

Shouldn't $schema->item($attribute_oid, "name") return a list of names then?

I tried @fullnames = $schema->item($attribute_oid, "name"); since the item()
function is aware of list vs. syntax context but it only ever seemed to 
return one name per OID.


Thanks for the help,
 Justin

Re: schema attributes method

[Clif H. <cl...@di...>]

> 
> On Fri, Feb 02, 2001 at 08:40:28AM -0000, Chris Ridd wrote:
> > Justin <da...@io...> wrote:
> > > Greetings!
> > > 
> > > 
> > > I am using version 0.22 of the perl library and Netscape Directory Server 
> > > version 4.12.  Whenver I retrieve the list of attributes using something
> > > like:
> > > 
> > >       my $schema = $ldap->schema("cn=Schema");
> > >       my @atts = $schema->attributes();
> > > 
> > > the array returned from attributes() is all upper case.  However, the
> > > values returned from the MUST and MAY listings for an object class,
> > > obtained by:
> > > 
> > >       my @may = $schema->item($oid, "may");
> > > 
> > > Returns a listing that is in Mixed Case, as it is returned from the
> > > directory.
> > > 
> > > 
> > > Can anyone explain why $schema->attributes does not return a mixed case
> > > listing?
> > 
> > Attribute names are of course not case-sensitive, so returning them in all
> > upper-case does not really matter.
> > 
> > But it is curious that it is inconsistent between the calls. Possibly the
> > attributes() call is returning the names after they've been internally
> > canonicalized, and the item call isn't. I think I can see this being done
> > in the _fixup_entry routine. Well, there are a bunch of calls to 'uc' in
> > there which weren't in the Schema module in perl-ldap 0.20, which returns
> > mixed case attributes from both calls.
> > 
> > Does calling $schema->item($oid) return upper- or lower-case stuff?
> 
> Calling $schema->item($att, "name") returns mixed case, which is what I want.
> (where $att is one of @att, returned from $schema->attributes()).
> 
> However!
> 
> The Netscape Directory Server 4.12 has multiple attributetype entries for
> a given OID.  "cn" and "CommonName" for example, share an OID.  I believe
> this is allowed as per rfc2251 section 4.1.4.
> 
> So calling $schema->item($att, "name"), while it returns a mixed case name
> as I like, will only ever return "CommonName" and never "cn" (or both).
> 
> 
> Justin
> > 
> > Cheers,
> > 
> > Chris
> 
> 


You can get the alias name(s) by retrieving the "aliases"
from the schema object.

Do something like the following;

my $oid = $schema->name2oid( "<attribute, objectclass, or matchingrule name>" );
@item = $schema->item( $oid, "aliases" );

print "aliases: @item\n";

If you want to see how many and what items are
associated with a retrieved "oid" do the following;

my @items = $schema->items( "$oid" );
print "@items\";

Regards,

Clif Harden           INTERNET:  c-h...@ti...
Texas Instruments                
Directory Services
6500 Chase Oaks Blvd, M/S 8412  
Plano, TX 75023        
                         Voice:  972-575-0855
                           FAX:  972-575-2418