EpubFormat.renderers.register(core.Div, 'list', NaturalText('ul'))
EpubFormat.renderers.register(core.Div, 'list.enum', NaturalText('ol'))
EpubFormat.renderers.register(core.Div, 'item', NaturalText('li'))
+EpubFormat.renderers.register(core.Span, 'item', NaturalText('li'))
class DivImageR(EpubRenderer):