Question: how to render a <figure>?

[Spomky]

Hi,

I am creating an extension to render figures instead of simple images

<figure>
    <img src="https://octodex.github.com/images/stormtroopocat.jpg" alt="Stormtroopocat" title="The Stormtroopocat">
    <figcaption>A Stormtroopocat at work</figcaption>
</figure>

My first idea was to have such a markdown data:

![Stormtroopocat](https://octodex.github.com/images/stormtroopocat.jpg "The Stormtroopocat")
*A Stormtroopocat at work*

The mardown above will render the following HTML:

<p>
    <img src="https://octodex.github.com/images/stormtroopocat.jpg" alt="Stormtroopocat" title="The Stormtroopocat">
    <em>A Stormtroopocat at work</em>
<p>

Then, I should be able to the stucture p >img,em and convert it into figure > img,figcaption.
Am I correct or totally wrong?