Syntax for <footer>

While toying with the figure ^^^ extension, I have implemented also footer that would fit nicely with this proposed cite extension, typically used in blockquote:

The footer extension would work like a blockquote, starting by a double ^^ and would translate to a footer tag:

> This is a blockquote
> ^^ This is a ""citation for name""

would translate to html:

<blockquote><p>This is a blockquote</p>
<footer>This is a <cite>citation for a name</cite></footer>

A footer can be multiline as a blockquote:

> This is a blockquote
> ^^ This is a multiline
> ^^ footer with a ""citation for name""