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From Ole Ersoy <>
Subject Re: ApacheDS partition implementation based on Relational Model
Date Thu, 02 Nov 2006 14:45:11 GMT
Hi Ersin,

Alex and I talked about doing this.

I need to finish the first version of the the design

OpenLDAP supports relational backends.

They also have this command:

ldbmcat  - LDBM to LDIF database format conversion

I think that performs relational to LDIF conversion.

Personally I need to be able to go between an LDAP
format, XML Schema format, and a relational format.

I'm planning on going with need a 4th representation
those  3, which will be Eclipse EMF Ecore (A subset of
OMG's meta object facility).

That way ecore is the common denominator.

So the initial thinking is that ldap attributes will
be mapped to attributes on an Ecore based model object
(Just a pojo really supported by the Eclipse EMF API).

The same Ecore model is used to generate the Hibernate
mapping (Preferably using annotations).

Then it's done.  Hibernate takes care of the rest.

I still need to put this in complete context, adding
in Alex's thoughts on virtual directories, etc.

That's a little off though...after the rpm mojo gets

- Ole

--- Ersin Er <> wrote:

> Hi all,
> I need some advice on implementing a partition for
> ADS based on the
> relational model and using SQL or Hibernate or JPA,
> or framework like
> them..
> First of all, is this realistic? Can we reach a
> usable result?
> How can we map Attributes to SQL model? Should we
> hold Attribute
> Values in blobs?
> Can we leverage the power of SQL SELECT for LDAP
> search operations?
> How much of the partition code in ADS can be used
> for this task?
> And please share any more ideas you have.
> Thanks in advance.
> -- 
> Ersin

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