<trackbot> Date: 20 May 2015

<Sebastian> trackbot-ng, start meeting

<trackbot> Meeting: Web of Things Interest Group Teleconference

Meeting Minutes

Souleiman to prepare a presentation on the JSON-LD and send by email

Soumya presented on IETF CoRE Link Format

which could be seen as a thing description language

CORE is for constrained RESTful environments

so it realizes REST over constrained nodes

CORE describes web linking via a link format

it can be used to describe hosted resources, and relationships between them

an interesting concept in CORE is its directory of resources

definitions in CORE are: resource type, interface definition, and function sets

the software implementation can be done in JSON

a description file is < 1 KBin size (lightweight)

The presentation by Soumya is based mainly on IETF RFC 6690, https://www.rfc-editor.org/rfc/pdfrfc/rfc6690.txt.pdf

Some questions on the actual attributes such as name, and what their values could be

Soumya to send some more explaining materials via email

Danh: the description should constitute both the protocols and the data with its context

So data should be self-describing

A point from Sebastian is on the actuators which is a point we could discuss later.

Danh presented on the OpenIoT project

the background for OpenIoT is the need to provide a unified data presentation across systems related to IoT

the barrier is that systems use their own data presentation

The approach is based on Web standards such as RDF, and HTTP as protocols

Nodes or things are described by URIs

and then RDF triples add facts about these things

Data can be serialized in various formats includeing JSON-LD, text, XML

Global schema as a common understanding: e.g. schema.org, SKOS, sensor ontology

related community groups: RDF stream processing

RDF with temporal semantics

a core concept in OpenIoT is that dynamic data and static data are combined using the unified data representation

An example is the use of the SSN ontology which allows the description of sensors meta data and also of sensor readings

Danh mentioned the Spatial Data on the Web Working Group which would be good to have a presentation about later on

Sebastian to contact Kerry Taylor on that topic

Conclusions and progress in the task force which would be published on the web page

<rkawada> Thank you