[Fiware-iot] Review commented by DCM

[Martin Bauer]

Dear Lorant and Juanjo,

I had a look at the answers to my comments and in some cases provided a final comment from my side. Below you find a few points that I consider important, not just for the deliverable, but in general:


-          Discussion about the "type" in the context element attribute: My main point simply was that if type is just a data type, the semantic type is not explicitly represented in the structure, e.g., if you have an attribute called indoor temperature, which is of type float, you have no way of directly saying that the result is a "temperature". Of course, you may have this information somewhere else, i.e., a model that says that the attribute with the name "indoor temperature" (of an entity of  type "room") is a temperature.

-          Regarding subscriptions to IoT resources: Looking at the Publish/Subscribe Enabler Interface picture, Juanjo suggested that the CB might be integrated in an IoT-oriented GE running on the same device as the IoT Resource. My comment: This depends very much on what assumptions you make for the CB (which stands for Context Broker, right?). Yes, you could do it - if that is the best way depends on further assumptions. For example, the device may be resource-constraint so putting CB functionality there may not be the best idea. Also, this picture says nothing about distribution, i.e., how many CB instances would you have, do they interact with each other, i.e., as a CC do I have to find one CB and get the information I require or do I first have to find hundreds of CBs and chose the ones I need? I think there are a lot of open points here, which require further discussions.



Best regards,

Martin

------------------------------------------
Dr. Martin Bauer
Senior Researcher
NEC Europe Ltd.
NEC Laboratories Europe
Software & Services Research Division
Kurfürsten-Anlage 36
D-69115 Heidelberg
Tel: +49/ (0)6221/4342-168
Fax: +49/ (0)6221/4342-155
E-Mail: Martin.Bauer at neclab.eu<mailto:Martin.Bauer at neclab.eu>
http://www.nw.neclab.eu

From: fiware-iot-bounces at lists.fi-ware.eu [mailto:fiware-iot-bounces at lists.fi-ware.eu] On Behalf Of Farkas, Lorant (NSN - HU/Budapest)
Sent: Donnerstag, 14. Juli 2011 13:44
To: fiware-iot at lists.fi-ware.eu
Subject: [Fiware-iot] Review commented by DCM


Hi Martin,

The data and context management group reviewed the comments from our merged list, could you please take a look whether they are acceptable from your perspective?

https://forge.fi-ware.eu/docman/view.php/11/275/DCM_revised_NSN_NEC_comments_FI-WARE+High-Level+Description+-+Data-Context+chapter+-+v1.0.doc

Thanks & Br,

Lorant

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