v1.0 introduced the ability to automatically number headings in a wiki page and to create a reference link to a section by its id, creating a link with the section number as the link label.
V1.1 fixed a bug & 1.2 introduced the ability to do the same but for Figure, when using the {{figure}} macro, see http://extensions.xwiki.org/xwiki/bin/view/Extension/Numbered%20Reference%20Macro/#HNumberedFigures26Tables
For full details, see http://extensions.xwiki.org/xwiki/bin/view/Extension/Numbered%20Reference%20Macro/
Enjoy!