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From "Eternach, Andreas (EXT)" <>
Subject AW: DITStructureRules (was: General Question related to object containment)
Date Fri, 06 Jun 2008 12:04:12 GMT
Hi guys,

I finally found a good explanatation about the DIT structure rules:

If we would go for an implementation of DIT-Structure-Rules in ApacheDS, then the algorithm
could look as follows (please correct me if I am wrong):

0. If a DIT-object is going to be created, then following steps should be performed:

1. Find the according Structure-Rule for the new objects type, if no Structure-Rule has been
found, then create the object

3.a If SUP is empty, then check whether the parent object class is the DIT-Root, otherwise
reject creation

3.b If a SUP has been specified in the Structure-Rule, then find the SUP-Structure-Rule. If
no SUP can be found then (what to do, throw an exception, user-error, schema-error ?)

4. Check whether the SUP-Structure-Rules name-form corresponds with the new object parents
object-type. If not, then user error, otherwise create the object. 

Best regards

Andreas Eternach

Siemens AG
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-----Ursprüngliche Nachricht-----
Von: [] Im Auftrag von Alex Karasulu
Gesendet: Mittwoch, 28. Mai 2008 01:42
Betreff: Re: DITStructureRules (was: General Question related to object containment)

Yep you're looking for dITStructureRules which constrain which structural
objectClasses can be subordinate to another structural objectClass.  I
really wanted to implement this (badly) but not much time for it these days.


On Tue, May 27, 2008 at 10:15 AM, Eternach, Andreas (EXT) <> wrote:

> Hi Emmanuel ,
> Thank you for the reply, but I guess you are talking about
> object-inheritance (I was talking about object-containment).
> However, the link you posted gave me some more information:
> It seems that I need to define DITStructureRules.
> But how to accomplish this? The Schema-Editor of the "Apache Directory
> Studio" does not provide the
> functionality to generate DITStructureRules.
> In the meantime I figured out that there exists an objectClass
> metaDITStructureRule.
> I can create instances of this class within my schema, but its just trial
> and error.
> Anybody has more information?
> Best regards and thanks in advance,
> Andreas
> -----Ursprüngliche Nachricht-----
> Von: Emmanuel Lecharny [] Im Auftrag von
> Emmanuel Lecharny
> Gesendet: Dienstag, 27. Mai 2008 15:27
> An:
> Betreff: Re: General Question related to object containment
> Eternach, Andreas (EXT) wrote:
> > Hi all,
> >
> Hi Andreas,
> >
> > i am quite new to LADP and Apache Directory Server. And i really hope
> > you can help me with a containment question.
> >
> > I have created a new Schema, which defines just two object-classes (lets
> > call them Product and ProductProperty).
> > Of course ProductProperty is a child of Product, i.e. Products consist
> > of ProductProperties.
> >
> > Therefore i need to ensure, that instances of ProductProperty may only
> > be created below instances of Product.
> >
> If those two objectClasses are related by an inheritance relation, then
> there is no way you can use the child without using the parent. In order
> to describe this inheritence relation, you simply define the
> ProductProperty objectClass as the child of the Produc ObjectClass using
> the 'SUP' keyword.
> >
> > Does anyone know how to define such rules / restrictions? Is it defined
> > in some RFC?
> >
>, par. 2.4
> >
> > Thanks in advance, Andreas
> >
> >
> --
> --
> cordialement, regards,
> Emmanuel Lécharny

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