Re: woce.ncml

• To: Roland Schweitzer <Roland.Schweitzer@xxxxxxxx>
• Subject: Re: woce.ncml
• From: John Caron <caron@xxxxxxxxxxxxxxxx>
• Date: Mon, 26 Feb 2007 10:13:43 -0700

Roland Schweitzer wrote:

Hi,

Thanks John.

It may sound like sour grapes at this point, but I've always thought the values element should look like:

<values>
  <value>4602</value>
  <value>4607</value>
</values>

yeah, at least that would be a good alternative.

you can use "," but you have to specify the seperator="," attribute

or maybe

<values>
  <v>4602</v>
  <v>4607</v>
</values>

I ran into this once before when I tried something like:
<values>
1 2 3
4 5 6
7 8 9
</values>

that should have worked, did it not work?

What I'm proposing is a bit of pain to type, but less ambiguous to parse.

Second question/issue. I changed the ncml, but the change didn't show up in TDS until I cleared the cache. Is that the expected behavior?

i would have said you needed to reinit the catalog. is the ncml in the cactalog?

Thanks again for doing my debugging for me. Glad it resulted in a couple of fixes to the convention parsing to make it worth your while.

like killing 3 flies in one mighty swing

Good to see you last week.

likewise, hope to see you again soon.

Cheers,
Roland

John Caron wrote:

Roland Schweitzer wrote:

<?xml version="1.0" encoding="UTF-8"?>
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
  <variable name="ntime">
    <attribute name="units" value="days since 1990-01-01 00:00:00"/>
    <attribute name="_CoordinateAxisType" value="Time" />
    <values>4602,4607</values>
  </variable>
  <aggregation dimName="ntime" type="joinNew">
   <variableAgg name="sea_level"/>

<netcdf location="http://dods.jpl.nasa.gov/dods-bin/nph-nc/pub/data_collections/woce_v3/topex/data/10_deg/ssh10d20020808.nc.gz"/> <netcdf location="http://dods.jpl.nasa.gov/dods-bin/nph-nc/pub/data_collections/woce_v3/topex/data/10_deg/ssh10d20020813.nc.gz"/>

  </aggregation>
</netcdf>

this should work:

<?xml version="1.0" encoding="UTF-8"?>
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>

 <variable name="ntime" type="int" shape="ntime">
   <attribute name="units" value="days since 1990-01-01 00:00:00"/>
   <attribute name="_CoordinateAxisType" value="Time" />
   <values>4602 4607</values>
 </variable>

 <aggregation dimName="ntime" type="joinNew">
  <variableAgg name="sea_level"/>

<netcdf location="http://dods.jpl.nasa.gov/dods-bin/nph-nc/pub/data_collections/woce_v3/topex/data/10_deg/ssh10d20020808.nc.gz"/> <netcdf location="http://dods.jpl.nasa.gov/dods-bin/nph-nc/pub/data_collections/woce_v3/topex/data/10_deg/ssh10d20020813.nc.gz"/>

 </aggregation>

</netcdf>

your main problem was using a "," in <values>, which was silently failing. also you need to specify type="int". I also discovered 2(!) more bugs in the convention parser, which you probably wont see.

• References:
  • Re: woce.ncml
    • From: John Caron