Re: [ebxml-cppa-negot] NDD Schema and Sample NDD instance document

[Martin W Sachs <mwsachs@us.ibm.com>]

Kartha,

Thank you very much for posting this material.  It's a major step forward.
I will study it next week.

Regarding your question in the last paragraph:  I believe that the thinking
of the team has evolved to the following: The initial offer is always a CPA
template and an NDD that references the CPA template.  When the Party1
wants to make an offer to a Party2 that has published a CPP and an NDD,
Party1 composes a CPA template from its and Party2's CPP.  Party1 then
composes a new NDD that references the CPA template and expresses its
negotiability requirements. Party1 SHOULD include Party2's negotiability
requirements (as expressed in its "CPP" NDD) in the new NDD.  In other
words Party1 SHOULD offer an NDD which is in some sense the inclusive OR of
its "CPP" NDD and Party2's "CPP" NDD. It is also the responsibility of
Party1 to insert into the CPA template the Start, End, and any other
elements that are present in a CPA but not a CPP.

I have said "Party1 SHOULD include Party2's negotiability requirements"
because I don't think that a SHALL could be enforced.  However, Party1
should expect that the negotiation will be much more likely to succeed if
Party2's negotiability requirements are included in the offered NDD.

The above is more or less what you say at the end, except that there is a
single composite NDD (referencing the CPA template) rather than 2 separate
NDDs in the initial offer.

Regards,
Marty

*************************************************************************************

Martin W. Sachs
IBM T. J. Watson Research Center
P. O. B. 704
Yorktown Hts, NY 10598
914-784-7287;  IBM tie line 863-7287
Notes address:  Martin W Sachs/Watson/IBM
Internet address:  mwsachs @ us.ibm.com
*************************************************************************************


                                                                                                                                     
                      "Kartha,                                                                                                       
                      Neelakantan"             To:       ebxml-cppa-negot@lists.oasis-open.org                                       
                      <N_Kartha@stercom        cc:                                                                                   
                      m.com>                   Subject:  [ebxml-cppa-negot] NDD Schema and Sample NDD instance document              
                                                                                                                                     
                      09/27/2002 05:51                                                                                               
                      PM                                                                                                             
                                                                                                                                     
                                                                                                                                     




Here is the promised NDD schema and a sample NDD instance document that
conforms to this schema. The NDD
instance document contains the first 15 or so elements in the spreadsheet
that we filled earlier this year. The elements
that are represented are different enough in their negotiability
characteristics, so that the NDD schema captures all
of the negotiation patterns I had identified earlier (in the document
titled
"Patterns in the negotiability of elements" that
I had posted to the list in June 2002.)

I have added comments on the NDD schema and instance document in the hopes
that people will read them. Please
send comments to me and to the list.

The NDD schema is based on a skeleton schema that Dale Moberg had sent to
me---however, note that I have made several changes and additions.

What remains to be done:

1. Flesh out the NDD instance document more. Doing this might require
additions/changes to the schema. However, in many (most?) cases,  what is
already in the schema should suffice.

2. Discuss whether the approach proposed here is appropriate/good enough.



I noticed one issue while doing this work. There are some elements (such as
Start/End etc.) that are present only in the CPA. Assuming that one starts
out with two CPPs, the two initial NDDs point to these two CPPs. The
question then is : how is the negotiation of these elements, present only
in
the CPA, to be done, since the NDD does not contain any references to them?
An approach is: first finish the negotiation of the CPPs, form a
preliminary
CPA, with some arbitrary values for these elements. Then form two NDDs for
this CPA, focusing on elements that are present  only in the CPA.

Comments?

Best regards,

Kartha


 <<NDD1.xsd>>  <<sample_NDD.xml>>





#### NDD1.xsd has been removed from this note on September 27 2002 by
Martin W Sachs
#### sample_NDD.xml has been removed from this note on September 27 2002 by
Martin W Sachs