Re: [CDNi] draft-ma-cdni-metadata-01.txt: mD objects extensibility

Hi Emile,

  By extensible, I mean that uCDNs should be able to define their own
  private metadata (if they want) to describe delivery functions that
  they support and if a dCDN understands it then that's great, but if
  not then the uCDN should be able to specify whether or not the dCDN
  must decline to serve the content.

  In general, I favor a protocol which has opaque data encapsulation,
  using a layered approach, but, there are certainly other ways to do
  it, and the WG may choose to go a different route.  I don't know if
  an 'extension' field is the best approach, but I hope that the CDNI
  MI specification will ultimately support vendor defined metadata.

thanx.

--  Kevin J. Ma

> -----Original Message-----
> From: emile.stephan@orange.com [mailto:emile.stephan@orange.com]
> Sent: Wednesday, November 02, 2011 10:20 AM
> To: Kevin J Ma; cdni@ietf.org
> Cc: ben@niven-jenkins.co.uk; mcaulfie@cisco.com; bsd@cisco.com
> Subject: [CDNi] draft-ma-cdni-metadata-01.txt: mD objects extensibility
> 
> Hi Kevin,
> 
> Following are my thoughts on v01.
> 
> IMO, It is obvious that the framework of CDNi will include objects
> extensibility and consequently support opaque metadata. The draft should
> focus on the identification of the information elements required to
> support the awareness and the restriction of the 7 interfaces listed in
> the introduction rather than promoting the need of opaque metadata.
> 
> So I propose that we add something like following in draft-davie-cdni-
> framework:
> 
> "5 Data modeling Framework
> 5.1  Objects extensibility
> 
>    CDNs interoperate to distribute content services that may require the
> exchange of
>    specific metadata.  Consequently each object is extensible and
>    includes a field 'extension' for this purpose. This applies to all CDNi
> interfaces.
> "
> 
> Regards
> Emile
> 
> > -----Message d'origine-----
> > De : cdni-bounces@ietf.org [mailto:cdni-bounces@ietf.org] De la part de
> > Kevin J Ma
> > Envoyé : mardi 1 novembre 2011 00:37
> > À : cdni@ietf.org
> > Objet : [CDNi] FW: New Version Notification fordraft-ma-cdni-metadata-
> > 01.txt
> >
> > An updated version of draft-ma-cdni-metadata has been uploaded.
> > It fixes some typos, incorporates some of the comments received
> > from the list, and adds some core metadata definitions.
> >
> > comments welcome.
> >
> > thanx.
> >
> > --  Kevin J. Ma
> >
> >
> > A new version of I-D, draft-ma-cdni-metadata-01.txt has been
> > successfully submitted by Kevin Ma and posted to the IETF repository.
> >
> > Filename:	 draft-ma-cdni-metadata
> > Revision:	 01
> > Title:		 Content Distribution Network Interconnection (CDNI)
> > Metadata Interface
> > Creation date:	 2011-10-31
> > WG ID:		 Individual Submission
> > Number of pages: 33
> >
> >
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