[Geopriv] HELD experiment at IETF 71

I wanted to let folks know about an experiment Hannes, James, and I have 
been working to set up at IETF 71 to see if we can deliver some basic 
location-based applications, using the IETF network as a platform.  The 
concept goes something like this:

+--------+           +-----+           +---------------------+
| Client |---HELD----| LIS |-----------| IETF (NetDisco [1]) |
+--------+           +-----+           +---------------------+

1. Client submits HELD request
2. LIS queries NetDisco (over an ad-hoc interface) for location of an IP
3. NetDisco returns civicAddress XML for the AP to which the requested 
IP is connected, e.g.:
<civicAddress
   xmlns="urn:ietf[tongue]arams:xml:ns[tongue]idf:geopriv10:civicAddr">
   <country>US</country>
   <A1>Pennsylvania</A1>
   <A3>Philadelphia</A3>
   <A6>Market</A6>
   <STS>Street</STS>
   <HNO>1201</HNO>
   <FLR>4</FLR>
   <ROOM>Ballroom A</ROOM>
   <LOC>front right</LOC>
   <PC>19107</PC>
</civicAddress>
4. LIS inserts civicAddress into PIDF-LO into locationResponse and 
returns to Client

James is going to be providing the LIS, based on the open source PHP LIS 
that Andrew Co. have developed [2].

We're still looking for clients.  As a start, we have at least two:
1. The open source HELD client [2]
2. I've made a small Java application that grabs location and posts it 
to a Jabber server as user status information (in a human-readble form); 
I'll send this out once it gets finalized in the next day or so.

Please feel free to send me an email if you're interested in 
participating or helping out in any way.

--Richard

[1] <http://www.netdisco.org/>
[2] <http://held-location.sourceforge.net/>
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