[DAS2] writeback spec

Steve Chervitz Steve_Chervitz at affymetrix.com
Thu Apr 27 19:16:23 UTC 2006

OK, Andrew's writeback spec is now accessible at:


Be sure to refresh your browsers to get the latest spec at

I re-established my cronjob to update all the documents in this das2
directory twice daily (00:01 and 12:01 East coast time).

This das2 directory is a new cvs checkout. I moved the previous das2
directory to das2.old, in case it contains anything we might need that isn't
in CVS (accessible via http://www.biodas.org/documents/das2.old/ ).


> From: Andrew Dalke <dalke at dalkescientific.com>
> Date: Thu, 27 Apr 2006 01:33:29 -0600
> To: DAS/2 <das2 at lists.open-bio.org>
> Subject: [DAS2] writeback spec
> I've written up a draft of the writeback spec.  It's in CVS.
>    das/das2/das2_writeback.html
> with the RNC in
>    das/das2/writeback.rnc -- for the writeback document
>    das/das2/mapping.rnc -- for the mapping from old URLs to new
> On the question of how to handle new records, which need
> new identifiers, I decided to go with the private identifier
> scheme.  The client uses "das-private:0000" where the "0000"
> is alphanumeric and 1 up to 20 characters long.  The server
> responds with a mapping document which looks like
>   <MAP from="das-private:0000"
> to="http://blah.com/das2/whatever/feature/123" />
> I decided on this instead of the "preallocate identifier"
> scheme because this requires less state on the server
> (it doesn't need to remember which identifiers were already
> issued) and because it supports versioning servers better.
> Is the web site being updated from CVS?  I see it hasn't gotten
> the updates I made on Monday.
> Andrew
> dalke at dalkescientific.com
> _______________________________________________
> DAS2 mailing list
> DAS2 at lists.open-bio.org
> http://lists.open-bio.org/mailman/listinfo/das2

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