Re: Comments on Device Description Repository Requirements 1.0

Mr. Lee,

Just a few questions: I understood that you were against 'breaking the
net' so I am curious to see your comments on this spec. Is this extra
layer of complexity designed to cater to a sub-category of internet
enabled devices really needed?  Can we not code according to standards and
expect that the existing infrastructure and agent detection tools be a
sufficient model of approach?

Amiably,

Sotiris Sotiropoulos

>
> I have suggested that the TAG and DAWG look at this spec.
>
> Glancing through
> http://www.w3.org/TR/2006/WD-DDR-requirements-20060410/
> the following things occur to me.
>
> A requirement:
>
> a) 2.11.  Use-case 1. Utilization of device description information
> from the DDR
>
>   The requirements don't say anything about cacheing.
>
>     If really every single request for content from a phone goes
> through the flow show, the server will be under intolerable load and
> a complete bottleneck.  It is clearly necessary for the content
> provider, or an intermediate node, to keep a cache of previous
> requests. This requires the cache control facilities
>
> and two informal thoughts:
>
> b) An unwritten requirement is that new technology is not invented
> where existing technology exists.
>
> (For example, HTTP caching provides the facilities necessary (proxy
> architecture, cache read-through, expiry time, etc) and do providing
> the DDR lookup over HTTP clearly allows the client architecture.
> SPARQL may provide a suitable protocol)
>
> c) "The Device Vendor develops, manages (e.g. updates existing device
> profiles when devices are upgraded)". That's interesting.  I
> understood that in the past, device vendrors have nor always been
> forthcoming with such information.  Will the DDR only use vendor
> data, or possibly third party data?  Clearly vendor data makes more
> sense, so long as it is provided.  Presumably the DDR architecture is
> not affected by this choice.
>
> Tim
>
>
>

Received on Friday, 5 May 2006 04:07:15 UTC