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Re: AW: [QB] ISSUE-32 relation to O&M

From: Richard Cyganiak <richard@cyganiak.de>
Date: Sat, 2 Mar 2013 18:30:58 +0000
Cc: Benedikt Kaempgen <kaempgen@fzi.de>, Government Linked Data Working Group <public-gld-wg@w3.org>
Message-Id: <6E625B26-DAC0-4F8B-B5F4-EFBC2757FD59@cyganiak.de>
To: Dave Reynolds <dave.e.reynolds@gmail.com>
On 1 Mar 2013, at 12:04, Dave Reynolds wrote:
> On 01/03/13 10:13, Benedikt Kaempgen wrote:
>>> Proposed approach: Address this via a working group Note.
> 
> Interesting thought.
> 
> The advantage of a separate note is that I'm more likely to be able to get people from the TC/211 community to review it if it is self-contained.  But maybe it is too short to justify a full Note.

I'm also concerned that this might be too short for a separate document.

Putting this into the UC&R seems like a good solution to me, if there's not enough time for putting it into the main spec. To make it easy for TC/211 to review the section (which I agree is a good idea), a separate temporary document could be created outside of W3C space, for the sole purpose of presenting it to TC/211.

Best,
Richard



> 
>> On a site note regarding a review of a refined specification: I am not in the office from 2nd until 6th of March.
> 
> OK, will aim to have a sufficiently stable version by 6th March for you to review.
> 
> Thanks,
> Dave
> 
>> Best,
>> 
>> Benedikt
>> 
>> [1] <https://dvcs.w3.org/hg/gld/raw-file/default/data-cube-ucr/data-cube-ucr-20130227/index.html#VocabularyshoulddefinerelationshiptoISO19156ObservationsMeasurements>
>> 
>> ________________________________________
>> Von: Dave Reynolds [dave.e.reynolds@gmail.com]
>> Gesendet: Donnerstag, 28. Februar 2013 18:55
>> An: Government Linked Data Working Group
>> Betreff: [QB] ISSUE-32 relation to O&M
>> 
>> ISSUE-32 [1] concerns the relationship between Data Cube and ISO 19156
>> Observations and Measurements.
>> 
>> Proposed approach: Address this via a working group Note.
>> 
>> [I had previously proposed a non-normative appendix to the spec, but on
>> reflection making this a WG Note allows it to proceed to a separate
>> timescale and is then not slowing down LC.]
>> 
>> The note would roughly say ...
>> 
>> o Data Cube can also be used for things like sensor measurements and
>> forecasting, it is not limited to statistics.
>> 
>> o A well known standard for measurement information is OGC Observations
>> and Measuresments (O&M), ISO19156.
>> 
>> o How does Data Cube relate to O&M?
>> 
>> o Since Data Cube has a concept qb:Observation it might be tempting to
>> think of this as being an Observation in the sense of O&M. In some cases
>> that may be appropriate but not always.
>> 
>> o O&M provides a representation for a how to describe the measurement
>> process, the phenomenon being measured and the domain ("feature of
>> interest") over which the observation takes place together with the
>> result of the measurement. The result may be a simple value but can be,
>> and often is, a set of values (Discrete Coverage) for example over time
>> or over space or both.
>> 
>> o Thus one approach to using both specifications together is to use Data
>> Cube as a representation for O&M Discrete Coverage. O&M provides the
>> contextual metadata describing the measurement process and measured
>> phenomena. Data Cube provides the representation for the values which
>> result from the observation, allowing us to give e.g. the time, location
>> of each sample within the result. The two complement each other.
>> 
>> Dave
>> 
>> 
>> [1] http://www.w3.org/2011/gld/track/issues/32
>> 
>> 
> 
> 
Received on Saturday, 2 March 2013 18:31:27 UTC

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