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Re: request for ssn agenda item please

From: Krzysztof Janowicz <janowicz@ucsb.edu>
Date: Tue, 7 Feb 2017 14:57:39 -0800
To: Kerry Taylor <kerry.taylor@anu.edu.au>, "public-sdw-wg@w3.org" <public-sdw-wg@w3.org>, Armin Haller <armin.haller@anu.edu.au>
Message-ID: <46ef4e80-d473-0f02-c11a-afa66418ff5b@ucsb.edu>
Frankly speaking, we generated so many emails and so many proposals that 
it is difficult to keep track of. We have multiple proposals, e.g., the 
one from Phil, on the table and instead of discussing them, we keep 
adding new proposals :-). Many of them are indeed very similar but a 
some are pretty different. Armin's request was to focus on the concrete 
platform issue first and this makes sense to me.

On 02/07/2017 02:50 PM, Kerry Taylor wrote:
> Could I please have a chance to speak on my proposal at a meeting? I 
> was surprised today by some statements made that seemed to totally 
> misunderstand it.
> I guess this is a consequence of it being discussed in a meeting when 
> I could not hear nor see any of that discussion last week … sorry.
> In this context, maybe this extract from an earlier email (from me 
> replying to Simon) helps (and yes, I think  this shows that Simon in 
> particular did  see a crucial point  in the proposal but did not see why).
> And to reiterate --- the original proposal from Jano on vertical and 
> horizontal integration behaved exactly this way. It is not new! Just 
> worked through for a real case and refined a little with rdfs:comments 
> also being aligned.
> -Kerry
> Change of topic…
> ØOn subclassing: why is it that you dislike having these in 
> alignments? Is there a principled reason for this application, or does 
> subclassing introduce some general difficulty that I’m not familiar with?
> Lots of reasons. *But the most important one is the bi-directional 
> interoperability*. So you can take a ssn full instance , let a 
> reasoner run for all the instances, throw away any non-sosa terms and 
> voila you have a proper sosa instance. E.g. if you have a 
> sosa:observation  subclass of ssn:observation you cannot do this. OTOH 
> you can take a sosa instance,  and it is a fully formed ssn instance 
> just start decorating it as it is with  any extra ssn properties you 
> want.  E.g. if you have a ssn:observation  subclass of 
> sosa:observation you cannot do this.
> Ok equivalentclass can do that right —but that ‘s inelegant for other 
> reasons.
> And its not an “alignment” --- what an ugly design  to make an 
> ontology ”align” with its  simple core! Truly bizarre.
> And what do we think we are doing to our poor users forcing them to 
> use the same term with two different prefixes in the same ontology? 
> Whoever would force  that on  anyone???? How are they supposed to know 
> what they are to do – even if they actually notice there is a 
> difference before they break everything.
> I should take on the task of formalising this  property  - I am quite 
> sure I did not invent it --- it  is really important to me  or else 
> how can sosa make any sense as a core of ssn?– and Jano’s original 
> modularisation proposal seems to have this property anyway. Where did 
> it all go wrong?
> *So … will you help?*Is there anyone out there that can understand 
> what I am saying yet?  Maxime seems to get it!!  I absolutely cannot 
> do this alone.
> Kerry

Krzysztof Janowicz

Geography Department, University of California, Santa Barbara
4830 Ellison Hall, Santa Barbara, CA 93106-4060

Email: jano@geog.ucsb.edu
Webpage: http://geog.ucsb.edu/~jano/
Semantic Web Journal: http://www.semantic-web-journal.net
Received on Tuesday, 7 February 2017 22:58:15 UTC

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