[esip-semanticweb] AQ Metadata - Machine Tags

[John Graybeal]

It depends on how you are defining a namespace.  One definition is any  
vocabulary. Another is any controlled vocabulary.  A third is a  
vocabulary managed as part of the web (or better, the semantic web),  
or in some other system that formally provides namespaces. (See [1]  
for definitions.)  Basically, the more restrictive your definition,  
the fewer namespaces that are available.

I am assuming with this answer that you are willing to spend the time  
to reformat these vocabularies as machine tags, Hmm, that may be a  
silly assumption -- I suppose you will just hand-enter the tags, so  
you just need a way to look up the terms, right?  So depending on the  
domain(s) of interest, there may be a variety of community  
vocabularies that will be suitable, and even lists of vocabularies,  
like at MMI [2].

The one vocabulary that I start with is the Climate and Forecast  
standard names [3], since a lot of attention has been paid to  
normalize those terms and make them very clear. (That said, the CF  
terms don't fill the domain space, they are a bit focused on  
modeling.) The published GCMD terms have accumulated more, umm,  
organically over the years, so you can find more irregularities in them.

John

[1] Definitions: http://marinemetadata.org/guides/dictionary
[2] MMI vocabularies: http://marinemetadata.org/refs/vocabularies
[3] CF Standard Names: http://cf-pcmdi.llnl.gov/documents/cf-standard-names/


On Jul 31, 2009, at 2:23 PM, Erin Robinson wrote:

> Hi All,
>
> I wanted to follow up on the machine tag conversation from the last  
> few weeks/semantic call. I think machine tags are the most flexible  
> way for our community to move forward, so I'm interested in testing  
> them out in our catalog. When I looked at the GCMD keywords already  
> available, the groupings are helpful (science, service,  
> projects...). However, the names aren't machine tag names, i.e.  
> ATMOSPHERIC SCIENCE.AEROSOLS, and what we want is something like  
> GCMD:Domain=Aerosols.
>
> How does this group think GCMD would be used as the namespace for  
> some machine tags? On the call, GCMD was the only namespace  
> mentioned. Are there other namespaces that should be considered? Are  
> there any examples?
>
> Thanks -
> Erin
>
> -- 
> Erin Robinson
> Graduate Research Assistant
> CAPITA: Center for Air Pollution Impact and Trend Analysis
> emr1 at wustl.edu
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John

--------------
John Graybeal   <mailto:graybeal at mbari.org>  -- 831-775-1956
Monterey Bay Aquarium Research Institute
Marine Metadata Interoperability Project: http://marinemetadata.org