[Go-essp-tech] DRS clarification

Thu Sep 9 05:03:54 MDT 2010

Hello Karl,

Sorry to raise another DRS issue - but following the last telco I've
been looking at the experiment setup in more detail in order to write
some code which will identify the "requested" data. Charlotte has also
shared with me some METAFOR discussions which, I think, concluded that a
coupled model which is run in atmosphere only mode will do so under the
same name. 

Thus, we may have data from model=ACCESS, expt=amip for both coupled and
atmosphere-only modes. As far as I can see, the only way these can be
separated in the DRS is by treating the atmosphere only version as a
physics perturbation. Would you agree with this interpretation, or have
I missed something?

If this is the case, I think we should add a sentence or two to explain
this usage in the DRS document,

Regards,

Martin

From: go-essp-tech-bounces at ucar.edu
[mailto:go-essp-tech-bounces at ucar.edu] On Behalf Of
stephen.pascoe at stfc.ac.uk
Sent: 09 September 2010 11:24
To: taylor13 at llnl.gov
Cc: go-essp-tech at ucar.edu
Subject: Re: [Go-essp-tech] ESGF Telco today 2010/09/07

Hi Karl,

I agree we don't have time to discuss this further.  If you can send
Martin and I the editable version of the DRS document we will
incorporate the changes necessary and feed it back to you to publish.  I
think any further discussion needs to be done on a document that brings
together all the issues.

Incidentally, there is a distinction between "variable_table" and
"variable/table".  The former implies a single DRS component with 2
parts and the second is 2 separate DRS components.  The DRS document at
the moment implies the former *in some circumstances*.  Looks like we
are settled on 2 components.

I also want the DRS document to reflect the various different encodings
of DRS components.  There are several and many omit several components:

 1. NetCDF filename created by CMOR

 2. NetCDF attributes created by CMOR

 3. DRS directory structure

 4. THREDDS publication-level dataset_id

 5. TDS URLs

Stephen.

---

Stephen Pascoe  +44 (0)1235 445980

British Atmospheric Data Centre

Rutherford Appleton Laboratory

________________________________

From: go-essp-tech-bounces at ucar.edu
[mailto:go-essp-tech-bounces at ucar.edu] On Behalf Of Karl Taylor
Sent: 08 September 2010 20:20
To: go-essp-tech at ucar.edu
Subject: Re: [Go-essp-tech] ESGF Telco today 2010/09/07

Dear all,

We probably shouldn't spend any more time on this.   Either proposed
solution seems to solve the probelm, so maybe we go with "group think",
unless someone can point out some practical implication that that choice
will make more work for someone (especially the users of the archive).

best regards,
Karl

On 9/8/10 10:34 AM, Gavin M. Bell wrote: 

Suggestion....

Hi Stephen, 

Can you please make the second to last token, namely:
<variable>_<table>, be like the other tokens in the taxonomy.
Specifically make it <variable>/<table>.  When parsing this, it makes it
a bit difficult to look for this new delimiter.  It complicates things a
bit.  Does it also mean that "_" are not allowed as a character in any
of the other bits of the taxonomy.  The regex becomes a real pain and
"regular" parsing is even worse.  It would make everything quite a bit
simpler if it was like the others. i.e.

cmip5/<product>/<institution>/<model>/<experiment>/<frequency>/<realm>/<
ensemble>/<version>/<variable>/<table>/<file>

Furthermore, is this structure saying that we are always going to be
using "cmip5" as the root of this taxonomy?

Please let me know your thoughts.  If you can accommodate this it would
be great!

On 9/7/10 3:17 AM, stephen.pascoe at stfc.ac.uk wrote: 

Today we plan to discuss the DRS directory structure and prerequisites
for starting replication tests between DKRZ and BADC.  I am putting
together an agenda at the link below, it's still evolving but comments
welcome.  Telephone details are also below.

Thanks,

Stephen

Agenda:
http://**proj.badc.rl.ac.uk/go-essp/wiki/CMIP5/Meetings/telco100907

Telco details:

16:00 BST, 17:00 CEST, 8:00 PDT, 9:00 MDT, 11:00 EDT.

+01 (925) 424-8105 access code 305757#

---

Stephen Pascoe  +44 (0)1235 445980

British Atmospheric Data Centre

Rutherford Appleton Laboratory

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Lawrence Livermore National Labs
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