[Standards] [XEP-0384] OMEMO: xml:lang + max_items

Philipp Hörist philipp at hoerist.com
Fri Jul 27 14:41:57 UTC 2018


Didnt know about that PEP sentence, i dont know any implementation that
does this, but still if its possible we should limit 0384 to singleton Node
usage, but to be honest so should every other XEP that depends on PEP.

you misunderstood me with the max_items=1, yes you can configure a node
with max_items=1 but you can also specify this in a pubsub request of a
Node (not config):

But this seems to be optional *also*

So indeed the only not optional thing here is Singleton Node

I think this is a good addition to the XEP, although i fear this would be a
namespace bump, but from practical experience every PEP impl sends only the
last item, so this is until now a  academic problem


2018-07-27 16:26 GMT+02:00 Goffi <goffi at goffi.org>:

> Hey, thanks for the quick feedback
> Le vendredi 27 juillet 2018, 16:10:38 CEST Philipp Hörist a écrit :
> > On the Pubsub Questions:
> >
> > 1. In Pubsub there is already defined the Singleton Node:
> > https://xmpp.org/extensions/xep-0060.html#impl-singleton, no need to
> > invent a new item id for that
> Oh great, I've missed this one. But it doesn't seems used by other clients
> unfortunately, would be nice to add an implementation note on that in
> XEP-0384
> > 2. I think its not specified because your client should not care how many
> > items are in a PubSub Node. Your Client either uses PEP and PEP should
> > only notify you about the last/most recent item on the node, i think
> > thats the reason PEP exists.
> XEP-0163 §4.3.4 says "When processing a new subscription, the service MAY
> send not only the last published item but instead all items that are
> currently associated with the node (i.e., up to the maximum number of
> items
> at the node, which might be one if the node is a "singleton node" as
> described in XEP-0060)", so it can send all items
> > 3. if you dont want to use PEP you can always request the most recent
> > item from a node with specifying max_items=1 in the request.
> It's not that I don't want to use PEP (I'm using it), it's that I don't
> want to have the same items recorded again and again for nothing.
> I've mentioned max_items=1 in my previous message, but this feature is
> optional, and if singleton is needed (which is the case), it should be
> indicated in the XEP-0384 in my opinion.
> > So my question would be, how do you get into a situation where a server
> > sends you all items of the Node?
> It's not in my notifications, I'm checking manually the content of my PEP
> nodes to check the workflow.
> >
> > regards
> > Philipp
> Thanks
> Goffi
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