[AppStream] Additional markup support in descriptions

[Robert Ancell]

On Sat, Jul 27, 2019 at 12:10 AM Richard Hughes <hughsient at gmail.com> wrote:

> On Fri, 26 Jul 2019 at 05:32, Robert Ancell <robert.ancell at canonical.com>
> wrote:
> > - emphasis <em>
>
> On the assumption that emphasis is normally rendered as italic I
> suppose. Fine for me, but see below.
>

I'd think you'd want to match the HTML defaults which is <em> = italic and
<strong> = bold. Though I'd only treat these tags as hints - it should also
be acceptable to do both as bold (e.g. on a command line) or do no
formatting if not appropriate in a particular client.

> - strong emphasis <strong>
>
> Works for me, but I suppose we'd need some kind of guidance about the
> amount of text is appropriate to make either <strong> or <em> -- e.g.
> you don't want app authors to make *everything* bold "just to make it
> stand out from other apps".
>

Since it's used in a description I don't see how this helps it stand out.
If markup was supported in titles or summaries then yes, this could be a
problem in search results. If there are any terrible metadata writers out
there some examples in the spec of good usage may help :)
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