[TF-TD] Next web meeting

Dear TD-TF members,

please find below the agenda and web meeting details for the TD on Wed, November 11thth at 14:00 - 15:30 CET / 5:00 - 6:30 PDT / 22:00 - 23:30 JST<http://www.worldtimebuddy.com/?qm=1&lid=8,12,1850147,100&h=2&date=2015-11-11&sln=5-6.5> [1].

Proposed agenda:
1) Plugfest – a quick report
2) Breakout F2F session: TD optimization & extending TD with context
3) Tech Landscape
4) AOB

Best wishes
Darko Anicic

[1] http://www.w3.org/WoT/IG/wiki/Main_Page#Teleconferences


Meeting details:
Meeting number: 643 820 889
Audio connection: +1-617-324-0000 US Toll Number, 643 820 889
Meeting password: wotig
Meeting link: https://mit.webex.com/mit/j.php?MTID=ma8aa4594b4fc8a5d7728eb2a586917ce




Von: Dave Raggett [mailto:dsr@w3.org]
Gesendet: Freitag, 6. November 2015 13:31
An: Public Web of Things IG
Betreff: [TF-TD] ISO 15926, the Semantic Web, and the open world assumption

In our landscape survey relating to thing descriptions, we should look at ISO 15926. This can be used with RDF named graphs and OWL for declaring that objects have named properties along with their unit of measure. This sounds similar to what we’re working on for the thing description language. Named graphics are an extension of RDF to quads involving <graph, subject, predicate, object>.

The following paper from the W3C workshop on the Semantic Web in Energy Industries could be relevant:

“ISO 15926 is a representation standard for information in the process industry. Based on an ontology approach to information, it lends itself to application using Semantic Web tools. We describe how OWL can be used with ISO 15926 to represent common industry classes and relations.” See [1] and [2].

The paper also mentions the need for representing second-order classes, and for keeping them apart from first-order classes. In other words, the means to make statements about classes as opposed to its individuals, see also [3].  This could be relevant to the situation where a large family of things share the same model apart from some aspects specific to particular things.

I am also thinking about the limitations of the RDF open world assumption.  In object oriented programming languages, instances of a class can override the definitions given on the class itself. We may find it useful to allow some limited form of this for thing descriptions. It would be helpful to collect some use cases to motivate the analysis.

[1] http://www.w3.org/2008/11/ogws-papers/kluwer.pdf

[2] https://en.wikipedia.org/wiki/ISO_15926

[3] http://ontogenesis.knowledgeblog.org/1080


—
   Dave Raggett <dsr@w3.org<mailto:dsr@w3.org>>