[Playlist] question about the XSPF specs

[Lucas Gonze]

I appreciate where you are going with this. Godspeed.

You are correct that an identifier is not necessarily playable, but this
doesn't disqualify playability. That flows from a subtle point of XSPF's
design. It is fundamentally a query language enabling user agents to get
something played that matches the user's expectations. The user agent is
free to resolve a YouTube link with a Spotify track and vice versa, but it
is certainly welcome to play a Spotify link within Spotify.

On Thu, Mar 26, 2020 at 1:54 AM Benoît Gréant <gordie.lachance at gmail.com>
wrote:

> If I understand correctly, that's exactly what i'm working on:
> I want to attach several music services links to a track; hoping that
> maybe the user can (because he's subscribed or something) play at least one.
> That's why I think this is not the same than a file location (which is a
> file everybody can play) or an identifier (which is not especially
> playable, like musicbrainz)
>
> B
>
> Le mer. 25 mars 2020 à 23:48, Lucas Gonze <lucas at gonze.com> a écrit :
>
>> Speaking of user agents, as always the issue is that music nowadays is
>> tightly held in deliberately non-interoperable pools. Is there hope for
>> loosening that grip?
>>
>> On Tue, Mar 24, 2020 at 10:26 AM Lucas Gonze <lucas at gonze.com> wrote:
>>
>>> You could put a YouTube link in the location element, or have multiple
>>> identifier elements, each one with a different YouTube link.
>>>
>>> The important thing is for user agents to support the convention. You'd
>>> want to put a little work into adoption in things like VLC.
>>>
>>> -Lucas
>>>
>>> On Tue, Mar 24, 2020 at 10:19 AM Benoît Gréant <
>>> gordie.lachance at gmail.com> wrote:
>>>
>>>> Hi and thanks for your kind reply.
>>>>
>>>> I understand why the identifier can work for a spotify track, but is it
>>>> relevant for a youtube link too ?
>>>> I mean, there might be several different Youtube videos for a same
>>>> track.  Which, then, is no more an ID, is it ?
>>>>
>>>> Thanks !
>>>>
>>>> B
>>>>
>>>> Le mar. 24 mars 2020 à 18:17, Lucas Gonze <lucas at gonze.com> a écrit :
>>>>
>>>>> After reading your more detailed issue description on Stack Overflow,
>>>>> I have posted this answer there.
>>>>>
>>>>> You should use the identifier element (
>>>>> http://xspf.org/xspf-v1.html#rfc.section.4.1.1.2.14.1.1.1.2) for
>>>>> things like Spotify links.
>>>>>
>>>>> The info element can also do what you need (
>>>>> http://xspf.org/xspf-v1.html#rfc.section.4.1.1.2.14.1.1.1.6), but you
>>>>> can only have one per track, so you couldn't cover more than one streaming
>>>>> service.
>>>>>
>>>>> Regarding the many years since the last update of the spec, maybe it's
>>>>> time to work on one. A blessed JSON version would be useful.
>>>>>
>>>>> It's productive to discover that the spec is not clearly communicating
>>>>> this information. In the time we wrote the spec most functioning Internet
>>>>> music was an MP3 on a web server. Now streaming services do the job. We
>>>>> could possibly fix this with an update to the documentation. For example,
>>>>> the sample playlists at http://xspf.org/quickstart/ could show how to
>>>>> do it.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Mar 24, 2020 at 10:05 AM Lucas Gonze <lucas at gonze.com> wrote:
>>>>>
>>>>>> Benoît, it's excellent to meet you. I am CC'ing the XSPF list at
>>>>>> playlist at xiph.org and copying this answer to the Stack Overflow
>>>>>> thread.
>>>>>>
>>>>>> The info element is designed to do what you need:
>>>>>> http://xspf.org/xspf-v1.html#rfc.section.4.1.1.2.14.1.1.1.6
>>>>>>
>>>>>> However, there can only be one info element per track.
>>>>>>
>>>>>> Regarding the many years since the last update of the spec, maybe
>>>>>> it's time to do one. A blessed JSON version would be useful.
>>>>>>
>>>>>> -Lucas
>>>>>>
>>>>>>
>>>>>> On Tue, Mar 24, 2020 at 1:38 AM Benoît Gréant <
>>>>>> gordie.lachance at gmail.com> wrote:
>>>>>>
>>>>>>> Hi guys !
>>>>>>>
>>>>>>> I love your XSPF thing :)
>>>>>>> Have been playing with it since several years, using it as base for
>>>>>>> my website (&API
>>>>>>> <https://www.spiff-radio.org/wordpress-soundsystem-plugin/soundsystem-api/>,
>>>>>>> &WP plugin) spiff-radio.org.
>>>>>>>
>>>>>>> I have a small question.  I want to attach (several) links to a
>>>>>>> playlist track (eg. spotify/youtuble/apple music...); what tag should I use
>>>>>>> for this ?
>>>>>>>
>>>>>>> Well, I posted the complete question on Stackoverflow
>>>>>>> <https://stackoverflow.com/questions/60822682/xspf-xml-playlist-specifications-how-should-i-format-links-to-one-or-several>
>>>>>>> .
>>>>>>>
>>>>>>> Thanks for your help.
>>>>>>>
>>>>>>> Benoît
>>>>>>>
>>>>>>
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