Geo Microformat

Kurt Schwehr's post about hCard reminded me of something I had been thinking about before Thanksgiving: the geo microformat needs to be towed into the shop for a major makeover. Compared to GeoRSS or GeoJSON it has very little power. I'm interested in applying hAtom to the Pleiades XHTML docs. Add location and I'd have something like an "hGeoRSS", but the geo microformat isn't going to be adequate for expressing the locations of Pleiades roads or regions.