From mira@informatik.uni-siegen.de Wed May  5 12:58:07 1999
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Subject: Re: DJ and Corba relationship service
To: lieber@ccs.neu.edu (Karl Lieberherr)
Date: Wed, 5 May 1999 18:56:34 +0200 (MET DST)
From: "Mira Mezini" <mira@informatik.uni-siegen.de>
Cc: mira@informatik.uni-siegen.de, dougo@ccs.neu.edu, jayantha@ccs.neu.edu,
        johan@ccs.neu.edu, lieber@ccs.neu.edu, lorenz@ccs.neu.edu,
        neeraj@tendril.com
In-Reply-To: <199905051649.MAA13888@stockberg.ccs.neu.edu> from "Karl Lieberherr" at May 5, 99 12:49:08 pm
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Status: R

Hi Karl:

sorry for not writting the source at the first place. The short 
description of the CORBA relationship service I am referring to is
in Szyperski's book "Component Software", pp.189. As far as I know,
David has the book. Szyperski's descrption is short but it gives
you an idea. You are right: 

> ftp://ftp.omg.org/pub/docs/
> does not seem to be well organizeed.

The service doesn't seem to be one of the most important and already
standard ones, presumably not implemented. In this sense DJ can be 
an important improvement of Java compared to other component 
technologies :-)

- Mira

> Hi Mira:
> 
> very interesting. In which CORBA document is that written?
> 
> Is it:
> 
> OMG96 
>     Object Management Group OMG. 
> 	CORBAservices: Common Object Services Specification (COSS). 
> 	    OMG, second edition, March 1996. 
> 
> Did you find it on the web?
> 
> ftp://ftp.omg.org/pub/docs/
> does not seem to be well organizeed.
> 
> -- Karl
> 
> >From mira@informatik.uni-siegen.de Wed May  5 10:47:06 1999
> >Subject: DJ and Corba relationship service
> >To: lieber@ccs.neu.edu (Karl Lieberherr)
> >From: "Mira Mezini" <mira@informatik.uni-siegen.de>
> >Cc: dougo@ccs.neu.edu, jayantha@ccs.neu.edu, johan@ccs.neu.edu,
> >        lieber@ccs.neu.edu, lorenz@ccs.neu.edu, mira@ccs.neu.edu
> >
> >just a thought that came into my mind while reading about 
> >CORBA services. One of them is the "relationship service"
> >-- is sounds like DJ is kind of an implementation of this  
> >service in Java :-). Here some extracts on this service:
> >
> >	Predefined relationships cover reference and containement.
> >        Nodes are used to associate objects with its relationships.
> >   	Traversal of a relationship web is supported by traversal objects,
> >	which start at a specified node and use a traversal-criteria 
> >	object to restrict the traversal to a certain relationships.
> >	A call back model is used to enable processing as the traversal 
> >	proceeds.
> >        
> >
> >- Mira
> > 
> >
>