[Standards] Marking up messages with metadata and XEP-0071

Ben Langfeld ben at langfeld.me
Thu Apr 9 16:59:43 UTC 2015


Florian, my concerns with your approach are twofold:

1. It is complicated and is not markup in the sense that is used by XML,
HTML, SSML, etc. Being abstracted means a complicated association step.

2. It does not accurately correlate. Imagine this example:

<message…>
  <body>Hi Joe Bloggs. How are you? Oh, and you Joe Bloggs too?</body>
  <mark>
    <mention jid='joe at example.com'>
      <by-string string='Joe Bloggs'/>
    </mention>
    <mention jid='joe2 at example.com'>
      <by-string string='Joe Bloggs'/>
    </mention>
  </mark>
</message>

This obviously doesn't work, and is very much more complicated than simply
permitting data-* attributes in the XEP-0071 security model (after updating
to XHTML5, of course).

On 9 April 2015 at 13:52, Florian Schmaus <flo at geekplace.eu> wrote:

> On 09.04.2015 06:10, Mel Adamaitis wrote:
> > Problem:
> >
> > In an XMPP IM client we are working on, it is necessary for mentions of
> > other users (for alerting, highlighting) to be based on a normalised
> > user identity, but displayed in a denormalized human-readable format.
> > Additionally, for a particular denormalized identity, there may be any
> > number of normalised identities. For example, user joe at example.com
> > <mailto:joe at example.com>should be mentioned as Joe Bloggs. The
> > relationship between the normalized and denormalized identities is known
> > by the client authoring the message, and must be transmitted with the
> > message for appropriate display and behaviour on the receiving end.
>
> I'm not sure if I would extend/modify xep71 for that use-case. If I had
> the requirement I would probably first try to mark the String and assign
> a semantic to the marked String by using an extra extension element:
>
> <message…>
>   <body>Hi Joe Bloggs. How are you?</body>
>   <mark>
>     <mention jid='joe at example.com'>
>       <by-string string='Joe Bloggs'/>
>     </mention>
>   </mark>
> </message>
>
> This has a few advantages:
> - It doesn't mess with xep71
> - It also works with clients who do not support xep71, i.e. just 'body'
> elements.
> - It splits the marking and the "assign semantic to mark" in two
> different tasks
>
>
> The last point basically means that the features of this extension could
> be diverse. While I'm not sure if it's really a good idea to use it for
> for anything and everything, it's good to have the option: For example
>
> <message…>
>   <body>Welsh looks like this: TI'n gallu ysgrifennu Cymraeg, ydy./body>
>   <mark>
>     <audio url='http://soundsoftheworld.com/welsh.mp3'>
>       <by-range start='23' end='56'/>
>     </mention>
>   </mark>
> </message>
>
> - Florian
>
>
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