Semantically-annotated Markdown ?

Hello schema.org community

I was recently asked by someone how he could insert semantic markup in HTML
pages generated from Markdown source files. Does anyone know of a Markdown
extension, and a markdown processor, capable of inserting either JSON-LD,
RDFa or Microdata in the generated HTML ?

If this doesn't exist, we should really invent "semantic markdown" ! Ideas
of such markup could be :

Inline annotation :
```
Tomorrow I am travelling to _Berlin_ {.schema:Place}
```

Title annotation :
```
### European Semantic Web Conference {.schema:Event}
```

Entity description :
```
### Specifications Meeting {.schema:Event}

* Date{.schema:startDate} : 11/10
* Place{.schema:location} : Our office, Street name, 75014 Paris
* Meeting participants{.schema:attendee} :
  * Thomas Francart{.schema:Person}
  * [Someone Else With a URI](https://www.wikidata.org/wiki/Q80)
```

Best Regards
Thomas

-- 

*Thomas Francart* -* SPARNA*
Web de *données* | Architecture de l'*information* | Accès aux
*connaissances*
blog : blog.sparna.fr, site : sparna.fr, linkedin :
fr.linkedin.com/in/thomasfrancart
tel :  +33 (0)6.71.11.25.97, skype : francartthomas