Re: Local Discovery addendum update for mDNS

This seems like an interesting idea, especially as a supplement to the
existing registration mechanism(s).  My initial thought is that this seems
a bit daunting for the average web developer, but I suppose it's not geared
at that crowd.

My second thought is that it may add unnecessary complexity to the API.  We
should definitely attempt to figure out how open folks are to investing in
the cost necessary to support this registration, as it moves outside of the
realm of the abilities of Joe WebDev.


On Fri, Jul 27, 2012 at 7:32 AM, Rich Tibbett <> wrote:

> Norifumi Kikkawa wrote:
>> Claes and I updated the addendum to support mDNS.
>> The basic idea is same as that for UPnP. The discovery protocol is used
>> to obtain the location of the WebIntents page.
> I haven't gone through the proposal in detail just yet but my
> understanding at this point is that it essentially provides a way to
> bootstrap the registration of standard Web Intents Providers via common
> discovery protocols (mDNS/DNS-SD and SSDP).
> As I mentioned at the F2F a couple of weeks ago I think that there is a
> big opportunity here to re-use the mDNS/DNS-SD parts of this spec to be
> able to bootstrap the registration of Web Intents providers from wide-area
> networks i.e. the web.
> The UA (though probably not individual web pages) could query the root DNS
> record of e.g. '' (by setting the mDNS search domain to '.
>') and then register any and all web intent services that are
> included therein automatically in the UA.
> It means that as a user navigates different domains on the web the UA
> itself could simultaneously and orthogonally make a query for Web Intent
> service records included in that domain's root DNS record (according to the
> format defined in this spec) and register those Web Intents in the UA for
> future invocation by any web pages.
> It would be an alternative (bootstrap) mechanism for registering web
> intent providers and it could be complimentary to both the programmatic and
> declarative way to register Web Intents that we have now. In some ways it
> may be even cleaner than the other registration methods since there is only
> ever one single authorative record of the Web Intents that any given domain
> provides (in the domain's root DNS record). That avoids the issue of
> different web pages on the same domain potentially contradicting each other
> wrt the Web Intent Providers available on the domain.
> I'm wondering if it's worth discussing this further here, if you have had
> any thoughts in this general direction and if it's something we might want
> to cover in this specification or elsewhere.
> Would be good to get input on having this type of bootstrap registration
> process for Web Intents.
> br/ Rich

Received on Monday, 30 July 2012 03:42:33 UTC