Re: SOSA/SSN integration architecture

Rob, please do have a close look at Option 2b/3b from Simon. Simon also agrees that your option and his are the same with the only difference being the MIME type handling. There is no need for subclassing in Simon’s option either, it just reuses terms from SOSA in SSN and adds axioms. I would like to merge your Option into the one from Simon to avoid confusion.


From: Rob Atkinson <rob@metalinkage.com.au>
Date: Friday, 24 February 2017 at 6:36 pm
To: Armin Haller <armin.haller@anu.edu.au>, Rob Atkinson <rob@metalinkage.com.au>, Maxime Lefrançois <maxime.lefrancois@emse.fr>, Raphaël Troncy <raphael.troncy@eurecom.fr>, "public-sdw-wg@w3.org" <public-sdw-wg@w3.org>
Subject: Re: SOSA/SSN integration architecture


No the difference is no neec to subclass sosa terms to ssn equivalents.

Perhaps this makes no difference after owl entailment but it makes a big difference in that ssn instances are not sosa instances without extra reasoning.

Rob

On Fri, 24 Feb 2017, 4:23 PM Armin Haller <armin.haller@anu.edu.au<mailto:armin.haller@anu.edu.au>> wrote:
Now that you have described your option, I don’t see any difference to Option 3b which itself is a slight variant of Option 2 (reusing of terms ONLY rather than reintroducing terms within the new namespace).

You define terms in SOSA.
In SSN you import these terms and add axioms.
If the term has not been introduced in SOSA, you define it in the new module-specific namespace (SSN).

If I interpret this correctly, it is exactly Option 3b with the addition of the mechanism of handling MIME types.

From: Rob Atkinson <rob@metalinkage.com.au<mailto:rob@metalinkage.com.au>>
Date: Friday, 24 February 2017 at 1:58 pm
To: Rob Atkinson <rob@metalinkage.com.au<mailto:rob@metalinkage.com.au>>, Armin Haller <armin.haller@anu.edu.au<mailto:armin.haller@anu.edu.au>>, Maxime Lefrançois <maxime.lefrancois@emse.fr<mailto:maxime.lefrancois@emse.fr>>, Raphaël Troncy <raphael.troncy@eurecom.fr<mailto:raphael.troncy@eurecom.fr>>, "public-sdw-wg@w3.org<mailto:public-sdw-wg@w3.org>" <public-sdw-wg@w3.org<mailto:public-sdw-wg@w3.org>>

Subject: Re: SOSA/SSN integration architecture

Have added option 5 and some clarifications to issue scope (i.e. what does extended mean)
Rob

On Fri, 24 Feb 2017 at 13:13 Rob Atkinson <rob@metalinkage.com.au<mailto:rob@metalinkage.com.au>> wrote:

IMHO My proposal is not an implementation of option 1,  because new terms in SSN are added to a new namespace, and only axioms 100% compatible to SOSA are allowed in SSN against SOSA defined terms.

Option 1 seems to be explicitly about the opposite strategy: new terms in SSN in the SOSA namespace and heroics in the infrastructure to manage finding these.

I'm convinced its different, and simpler than the existing options and will add it - we can always remove it if people can prove one of the other cases is equivalent,

Rob




On Fri, 24 Feb 2017 at 10:38 Armin Haller <armin.haller@anu.edu.au<mailto:armin.haller@anu.edu.au>> wrote:
Thanks!

I have removed the *bold* in the implication of Option 1. I do want to keep the implications neutral. Some people may care a lot about that specific implication, some others not.

I also deleted the statement “always the case with slash-based URIs” with the “One needs to dereference a term to figure out where this term is defined”. Raphaël added the yesterday as an implication. The commonly expected behaviour/expectation with Ontology Slash URIs on the Linked Data Web is that the ontology sits at the directory level of that term. I think it is a valid point to make in this option that the behaviour here and in Option 2 would be different. Again, some people may care about that, some others not.

From: Maxime Lefrançois <maxime.lefrancois@emse.fr<mailto:maxime.lefrancois@emse.fr>>
Date: Friday, 24 February 2017 at 6:09 am
To: Raphaël Troncy <raphael.troncy@eurecom.fr<mailto:raphael.troncy@eurecom.fr>>, Armin Haller <armin.haller@anu.edu.au<mailto:armin.haller@anu.edu.au>>, "public-sdw-wg@w3.org<mailto:public-sdw-wg@w3.org>" <public-sdw-wg@w3.org<mailto:public-sdw-wg@w3.org>>

Subject: Re: SOSA/SSN integration architecture

Dear all,

I updated option 1, and highlighted its multiple variants,

I would like to highlight variant sosa1, for which looking up the unified namespace leads to the SOSA ontology.

Kind regards,
Maxime


Le jeu. 23 févr. 2017 à 12:12, Raphaël Troncy <raphael.troncy@eurecom.fr<mailto:raphael.troncy@eurecom.fr>> a écrit :
> ➢ Done, changed it on the Wiki. I think that makes it clearer.

Thanks.

> ➢ You can use the ontology URI to figure out which terms are in the core (SOSA). It is the same behaviour as in Option 1. In Option 1 you also either need to dereference each term to figure out where it is defined or to use the ontology URI of SOSA or SSN explicitly. If you think this is an important caveat, you can spell that out in the implication for both options.

I agree, this is true for both options 1 and 2. Done, I have added for
each: "* One needs to dereference a term to figure out where this term
is defined OR to use the ontology URI of SOSA or SSN explicitly since
there is just ONE unify namespace."

Note: Option 3b is still Option 3b and not a variant of Option 1
although it could be.

   Raphaël

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