Re: addressable identifier?

> On 27 Jul 2017, at 19:44, laurent.lemeur@edrlab.org <mailto:laurent.lemeur@edrlab.org> wrote:
> 
> Imho the identifier of a WP is not required to be addressable. Any global identification scheme could be use in fact (e.g doi). But Urls are easy to mint and avoid centralization issues; they are the de facto identification scheme on the web. As the manifest is the only resource specific to a WP, its address is a logical choice.

OK, makes sense.
But then, the URL to a manifest may change, or two different URLs can point to the same manifest:

https://resilientwebdesign.com/manifest.json <https://resilientwebdesign.com/manifest.json>
https://resilientwebdesign.com/books/../manifest.json <https://resilientwebdesign.com/manifest.json>

(dumb case, but you see the point).

All I'm saying is I understand the manifest _can_ be used as an identifier in a given context (e.g. a UA), but there's nothing to say about that in the spec, right? There's a URL, people can use that as an identifier or not.

As far as I can tell, there's no such concept in web sites and apps, and I don't see that publications need anything other than a loosely specified "dc:identifier" property in metadata. (Maybe I'm wrong, I'm just not convinced yet :-)

> Pls refrain using other arguments like "it's not what users want to share" : users will share the "start" URL which will be different. 

+1.

> 
> Cordialement, Laurent
> 
> Le 27 juil. 2017 à 18:36, Hadrien Gardeur <hadrien.gardeur@feedbooks.com <mailto:hadrien.gardeur@feedbooks.com>> a écrit :
> 
>> I think you were initially in the "others" Romain, but not by the end of the conversation where you clearly understood the difference that I made between "start" and "self" links.
>> 
>> IMO the use case for an identifier is simple: we want to uniquely identify a WP. For instance if I add multiple WP in a UA, this is the identifier that the UA will rely on internally to associate various attributes and settings to a WP.
>> 
>> The URI of a primary resource can't uniquely identify a WP, since it can be present in multiple WP. That's not the case of a manifest, which is unique to a WP.