Re: fixing ssn

Hi Kerry,

> Perhaps all this work was discussed in focus well before you became 
> active in the ssn subgroup. 

I was active from the beginning so I remember out discussions. I just 
wanted to make sure we are not stepping back from our SOSA and 
modularization ideas/work for the new version of the SSN to be 
standardized. Thus, it was unclear to me why we would need changes to 
the old SSN.

Best,
Krzysztof


On 09/11/2016 06:20 PM, Kerry Taylor wrote:
>
> Krzysztof,
> Perhaps all this work was discussed in focus well before you became 
> active in the ssn subgroup. It was indeed some time ago, ie more than 
> 6 months ago,  but has sat still while the modularity design (yet to 
> be tested by experimentation/implementation) ,   SOSA and IoT issues 
> have been given more attention.
>
> We are tasked to bring SSN to a standard, and to simplify and make it 
> easier to use, especially by modularisation. An early  decision was 
> made to separate dolce, and this was done at that time,  but it became 
> apparent that something had gone wrong as we published it  in our 
> FPWD, so I have done it again here  from scratch (with minor 
> improvement –e.g. new dolce namespace). Given that SSN needs to be 
> broken up (through horizontal and vertical modules, as extensively 
> discussed, but with no resolution on how big/many of these there would 
> be) , it would be very sad and painful  to do that from a base of an 
> SSN now with  unintentional errors in it.   Certainly experimentation 
> is needed, but a clean, common  base is surely a worthwhile thing to have.
>
> Some of these problems (see below) were always there (and that is 
> where I plan to work next, with the group’s support).   This was 
> discussed briefly in the last ssn meeting too, but is also on the 
> agenda for the F2F. I hope we can focus there on the next steps for 
> modularisation.
>
> Does that address your concerns?
>
> --Kerry
>
> *From:*Krzysztof Janowicz [mailto:janowicz@ucsb.edu]
> *Sent:* Monday, 12 September 2016 5:16 AM
> *To:* Kerry Taylor <kerry.taylor@anu.edu.au>; public-sdw-wg@w3.org
> *Subject:* Re: fixing ssn
>
> Hi Kerry,
>
> I am bit surprised by your message and what exactly it means. How does 
> working on the old SSN align with SOSA and everything else we 
> discussed over the past 6 months?
>
> Best,
> Krzysztof
>
> On 09/11/2016 07:14 AM, Kerry Taylor wrote:
>
>     I have just “fixed”  the dolce removal from ssn. The version we
>     were looking at on webprotege had some errors of uncertain
>     provenance, so I went back to SSN  as it was left by the XG here
>     https://www.w3.org/2005/Incubator/ssn/ssnx/ssn.owl (more commonly
>     known as http://purl.oclc.org/NET/ssnx/ssn) and removed dolce all
>     over again. I also changed the ssn namespace to the new W3c one,
>     and the dolce one to the new one
>     http://www.ontologydesignpatterns.org/ont/dul/DUL.owl, and added
>     some  annotation comments to reflect this.
>
>     We now have, on github, a new folder sdw/ssn/ssn_separated which
>     contains ssn.owl
>     <https://github.com/w3c/sdw/blob/gh-pages/ssn/ssn_separated/ssn.owl>
>     and dul-alignment.owl
>     <https://github.com/w3c/sdw/blob/gh-pages/ssn/ssn_separated/dul-alignment.owl>
>       . The latter imports dolce but the former does not.   If you
>     look at the alignment ontology you can see that ssn has lost a few
>     important things that now cannot be said at all and will need to
>     be natively  rebuilt,  in addition to the constraints that dolce
>     gave it.
>
>     There are also a good few “bugs” remaining – but these are all
>     original ssn bugs. I am thinking of a few things in annotations
>     (including stuff we already changed in the web-protégé version)
>     and a lot of typos, and at least one place where some class is
>     explicitly subclassed from owl;thing.
>
>     I plan to gradually work through those bugs – and will bring to
>     the attention of the list anything that is not either already
>     decided or for which there is some choice about what to do.
>
>     If anyone would like to give it a once-over in case I have done
>     something stupid, please do.
>
>     --Kerry
>
> -- 
> Krzysztof Janowicz
> Geography Department, University of California, Santa Barbara
> 4830 Ellison Hall, Santa Barbara, CA 93106-4060
> Email:jano@geog.ucsb.edu <mailto:jano@geog.ucsb.edu>
> Webpage:http://geog.ucsb.edu/~jano/ <http://geog.ucsb.edu/%7Ejano/>
> Semantic Web Journal:http://www.semantic-web-journal.net


-- 
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