TheOptimizationIdiot - 4:12 pm on Apr 9, 2013 (gmt 0)
@backdraft7 - as netmeg says structural data is your microdata/microformats.
Usually. They're also getting to where they can detect things in a standard format through tables and lists without microdata being present. Of course, the degree of accuracy as to what they think they're detecting may vary, so I think it's better to code it personally.