table notes

In published work, tables and figures often require
explanatory notes.

In rst there appears to be an odd difference in structure between
tables and figures.  A figure is understood to have three possible
types of content, and image, a caption, and what is called a "legend"
(which can hold explanatory notes).

A table does not do this, but it could.
Might this be considered as a possible enhancement?

Thanks, Alan Isaac