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<font face="Times New Roman">Dear all,<br>
<br>
In February I asked for comments on my proposal to extend the DRS
to include information about spatio-temporal subsets or means. I
heard from Jamie, but no one else. I respond to Jamie below, but
I also would like your input specifically about:<br>
<br>
1. Is this method of describing spatio-temporal subsets
acceptable?<br>
2. Is it worth taking this step if we don't say anything about
other "processed" output? For example how to describe
"regridded" data or multi-model means.<br>
<br>
I've attached the proposed version of the DRS, which differs from
the one I sent in January only in a couple mods made in response
to Jamie.<br>
<br>
Best regards,<br>
Karl<br>
</font><br>
On 2/13/12 6:47 AM, Kettleborough, Jamie wrote:
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
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<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">Hello Karl,</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">this will be terse as
I have time to review, but not to necessarily get the words
right - hope I don't say anything too bad because of this.</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">1. section 2.3, Not
sure 'output' should be mentioned under 'product'. I don't
think 'output' ever makes it to publication level, so does
not need to appear in a publication level id. I know cmor
produces it, but I think that's kind of historical isn't it,
rather than necessary? Maybe its too late for details like
this?</font></span></div>
</blockquote>
It's true that in the end the CMIP5 output should not remain as
"output", but be assigned to "output1" or "output2". Nevertheless,
I don't think there is any harm in keeping it in the DRS. <br>
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">2. section 2.3 version
number: to be consistent with what we really have in CMIP5 I
think you need to note that v1, v2 are also present, though
any *new* versions should use vYYYYMMDD.</font></span></div>
</blockquote>
I have modified the text to indicate that software cannot rely on
the version number reflecting a date.<br>
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">3. section 2.3
version: I wonder if you need to say more (maybe not here,
but if not where?) about what triggers a new version. I
think its </font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2"> a. anything that
changes the content of a file already published and</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2"> b. the addition or
deletion of files from any publication data set. </font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2"> Pure 'data
management' meta data changes (addition of checksums, move
to new URL's) need not trigger a new version.</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2"> Do you also need to
say there is no guarantee that old versions will be kept
(unless they have a DOI).</font></span></div>
</blockquote>
I've added some of this information now to the document.<br>
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">4. section 2.4
Temporal Subsets or means: I don't understand the 'avg'
example, or if I do I don't know if its right (but the point
is relatively minor). I think the example you quote as one
6 month mean field in it. This is based on 1 day means. I
think its a little anomalous to keep the frequency as 'day'
in this case. That's not quite consistent with the
definition (and I think all other uses) of frequency.
Strictly speaking frequency should be 6mon no? (I may have
misunderstood).</font></span></div>
</blockquote>
I think you're right. I'm not sure why I thought this was the right
way to do it. I've changed the example, <br>
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">5. section 3.5. Does
this need clarifying? I think the current wording
is potentially confusing, I think it should say something
like:</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">'URLs referencing the
data files will have a site dependent prefix (that may
change due to site-specific data management tasks) followed
by the directory structure. This directory structure should
(but may not) follow the recommendations of section 3.3'</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"></span>
<br>
</div>
</blockquote>
I've modified the text as suggested.<br>
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">6. I've noticed that
the thredds catalogs also expose a thing called the file_id,
e.g</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2"><property
name="file_id"
value="cmip5.output1.CNRM-CERFACS.CNRM-CM5.rcp45.mon.ocean.Omon.r1i1p1.vo_Omon_CNRM-CM5_rcp45_r1i1p1_203601-204512.nc"/></font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">I don't know if they
need a mention as being anything important (we don't use
them as they don't give any version info).</font></span></div>
<div dir="ltr" align="left"><span class="096222214-13022012"></span>
<br>
</div>
</blockquote>
We've already given 5 use cases, which I think is enough. The DRS
is used in a number of other ways.<br>
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">Hope this is useful,</font></span></div>
</blockquote>
Yes thanks very much!<br>
Karl<br>
<blockquote
cite="mid:E51EDFEBF10BE44BB4BDAF5FC2F024B90FB7FB29@EXXMAIL02.desktop.frd.metoffice.com"
type="cite">
<div dir="ltr" align="left"><span class="096222214-13022012"></span> </div>
<div dir="ltr" align="left"><span class="096222214-13022012"><font
color="#0000ff" face="Arial" size="2">Jamie</font></span></div>
<br>
<blockquote style="BORDER-LEFT: #0000ff 2px solid; PADDING-LEFT:
5px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<div dir="ltr" class="OutlookMessageHeader" align="left"
lang="en-us">
<hr tabindex="-1"> <font face="Tahoma" size="2"><b>From:</b>
<a class="moz-txt-link-abbreviated" href="mailto:go-essp-tech-bounces@ucar.edu">go-essp-tech-bounces@ucar.edu</a>
[<a class="moz-txt-link-freetext" href="mailto:go-essp-tech-bounces@ucar.edu">mailto:go-essp-tech-bounces@ucar.edu</a>] <b>On Behalf Of </b>Karl
Taylor<br>
<b>Sent:</b> 10 February 2012 01:32<br>
<b>To:</b> V. Balaji; Steve Hankin; Martin Juckes; Bryan
Lawrence; Stephen Pascoe; <a class="moz-txt-link-abbreviated" href="mailto:go-essp-tech@ucar.edu">go-essp-tech@ucar.edu</a><br>
<b>Subject:</b> [Go-essp-tech] DRS corrections and
extensions<br>
</font><br>
</div>
<font face="Times New Roman">Dear all,<br>
<br>
Attached is my attempt to make the DRS consistent with CMIP5
(in describing the precision of "time instants"), but
primarily to extend it to a more complete treatment of
spatio-temporal subsets or means. I've also corrected a few
typos.<br>
<br>
Comments most welcome. In particular could someone recheck
sections 3.3-3.5 (which haven't been changed by me) to see if
they remain consistent with CMIP5?<br>
<br>
thanks and best regards,<br>
Karl<br>
</font></blockquote>
</blockquote>
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