Stage One Proposal: Change the specialization base of imagemap

Originally, <imagemap> was a specialization of <fig>.
This means you cannot use an <imagemap> directly inside of a <fig>, which makes it complicated to add a title to your image.
You can work around this by using a <div> inside of the <fig>, but that seems like an extra layer of complexity.
If we change the specialization base of <imagemap> from <fig> to something slightly more generic such as <div>, that may simplify the adding of a title (or other content) around an <imagemap> in a <fig>.
I would like some technical assistance determining which element makes the most sense to specialize from.
Thanks, Zoë Lawson