No subject

say you have good chances to get things done nicely here. Although I =
don't agree on all your opinions (read: OpenID, OAuth), sometimes =
someone has to implement things *when and *how she thinks it is right =
without political constraints to make an impact.

After all someone could think about paying you for your work. At least a =
bit more than a hippo and a missing free t-shirt.


-----Urspr=FCngliche Nachricht-----
Von: opensim-dev-bounces at lists.berlios.de im Auftrag von Cristina =
Videira Lopes
Gesendet: Mi 03.06.2009 21:37
An: opensim-dev at lists.berlios.de
Betreff: [Opensim-dev] OGPX and IETF-ing things [text]
=20
Inifinity sent me a very nice private message, which, because it was =20
private, I'm not going to forward here. But the bottom line of his =20
nice message could use some public discussion. Essentially Infinity =20
is suggesting that we move towards getting the Hypergrid work into =20
the IETF, through this newly created OGPX working group.

Personally, I think this is all premature. IETF-ing the Hypergrid is =20
premature for different reasons than IETF-ing OGP is premature. The =20
Hypergrid is not really ready for prime time until we have the =20
Hypergrid2 in place, with its security model to protect users from =20
malicious simulators. OGP is not ready for prime time because no one =20
has seen it yet, at least not any reasonably complete implementation =20
of it.

The right thing to do, I think, is to first have implementations of =20
both OGP and the Hypergrid2 in OpenSim. Once that is in place, we can =20
all see the similarities and differences, and try to standardize the =20
similar pieces. Alternatively, we can try to work together towards =20
one single interop protocol, but honestly I think that's not going to =20
happen, simply because there is space for many (not just 2, but 3 or 4)

What I suspect will happen is that OGP and the Hypergrid will have =20
several pieces that are very much in sync, with small details that =20
are different, and then they will have a few really important pieces =20
that are substantially different. Things like posting/retrieving =20
agents to/from regions, for example, we already converged to using =20
REST; inventory access, we already converged to using capability =20
URLs, etc. Small details such as the format of the data on the wire =20
are different, but that doesn't really matter as long as we agree =20
that the Content-type can be set to different things.

The thing that will be substantially different is the issue of =20
authority: what component has authority to do what. In OGP regions =20
are still the ones doing agent transfers, therefore implying a trust =20
relation between interacting grids that must be established in some =20
non-technical manner (i.e. the receiving region trusts that the =20
sending region is not stealing the user's identity). In the =20
Hypergrid, agent transfers between non-trusting regions are done on =20
the client side, so that the identity of the user can always be =20
verified, there is no region in the middle acting on behalf of anyone.

So, that's the main difference, as far as I understand OGP.

The Hypergrid2 is in place through a proof-of-concept prototype =20
client (Grider) and a couple of small but horrible hacks in OpenSim. =20
OGP implementations don't exist yet, or they are not available to us =20
which is the same. I think there's a lot of work to do before we go =20
and propose any of this as standards.

But I thought I'd bring this up for discussion. Maybe other people =20
aren't as strict on working implementations as I am.

Crista

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