Re: [Geopriv] Re: teasing apart: http as a GEOPRIV using protocol

Hi Andy,

Andrew Newton wrote:
> Inline...
> 
> Hannes Tschofenig wrote:
> 
>> Hi Henning,
>>
>> here is the reason why I think we are not talking about a 'using 
>> protocol' here: All we want is to perform dereferencing.
> 
> 
> Since the place where the reference is made also includes an identity, 
> it is very easy to get the location of a user... and hence the line is 
> crossed with regard to privacy.

What identity is used where?

> 
>> We don't want something that does all the fancy features of a presence 
>> solution.
> 
> 
> So why did GEOPRIV use PIDF as its basis? 

You misunderstood my statement. For dereferencing a 
location-by-reference (not a subscription URI) we don't need a lot of 
functionality.

  Has as been quoted on this
> list recently, 4119 does not require the use of presence solution, but 
> presence solutions were very much a target platform.
> 
>> I am not even sure where the privacy rules should come from. In the 
>> Geopriv L7 discussion we had at least a proposal that some of us 
>> didn't like (namely the end host provides the privacy rules to the 
>> LIS). I haven't seen such a proposal here.
> 
> 
> An L7-LCP does not have to be a using protocol primarily because the 
> usage is for a much narrower purpose.  It can be a GEOPRIV using 
> protocol, but I believe one of the complaints against HELD (which 
> attempted to be an L7-LCP and GEOPRIV using protocol) is that it was 
> doing too much.

I like to discuss about requirements and functionality rather than 
terminology. I think that statements like "has to be a using protocol" 
help to make a lot of progress.

That's my only objection.

I am the last one to say that we do not need to deal with privacy aspects.

> 
>> Here is my question (I raised it already with my scenario list): Where 
>> does the SIP proxy get the information to construct a PIDF-LO?
>>
>> * We assume that it gets the location information somehow. Not further 
>> specified and might depend on the deployment environment.
>>
>> * What is the "entity" attribute of the 'presence' element?
>>
>> * Where does the content for the usage-rules (e.g, 
>> 'retransmission-allowed', 'retention-expires', 'ruleset-reference', 
>> 'note-well') come from?
> 
> 
> It is possible that a network operator does have enough information to 
> formulate a PIDF-LO, at least what is necessary for emergencies.
Would you be happy with this level of detail?
... and: We are not only focusing on emergency services.


Ciao
Hannes

> 
> -andy
> 
> 


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