Roberto Ostinelli a écrit : >> Agreed, I think. >> >> My argument is that this doesn't matter, at least at this point. I'm a big > fan >> of use-case-driven development, and at the moment I'm not aware of a > single example >> of, for example, two RSS / Atom feeds linking to each-other [as metadata]. > >> Linkages between PubSub Items is trivial and well understood, but I'm not > even sure >> what linkages between PubSub nodes would *mean*. >> >> Web APIs work fine at the moment, and discovery is driven by > documentation, not high >> engineering solutions. >> >> b. > > we do have an use case of the kind. it's a a distributed architecture where > xmpp servers are the backbone. > > instead of having an unique pubsub node on one unique centralized xmpp > server to which all interested entities subscribe (in a 1->n relationship), > every xmpp that complies to the architecture has a pubsub node which has a > standardized name, 'news', and every client which is interested subscribes > to the 'news' pubsub node of its own xmpp server. > > xmpp servers then provide relaying between 'news' node pubsubs, so that an > item published on the 'news' pubsub node of xmpp server A is also published > on the 'news' pubsub node of xmpp server B. this builds an n->n relationship > and is interesting for many reasons. > > i am not sure what is the best way to provide such relays, i'm currently > using a xmpp server component which acts like a subscriber to the 'news' > pubsub node of other xmpp servers and: > > - checks if a pubsub item has not been already treated [to avoid > redundancy]; > - if not, publishes it on the 'news' pubsub node of its own xmpp server. > > just some thoughts. > > r.
I don't think that the proper of seeing it. Nodes are discrete to the pubsub service the live in. What matters is the item they carry, in turn that item is actually just an envelop around a IRI that allows to retrieve the resource. The distributed aspect is already existing thanks to that mechanism of URI/IRI. If you want several pubsub services to talk about the same resource simply ensure each one has an item holding that IRI. I don't think propagating nodes is reasonable or has any benefit. - Sylvain
