http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Introduction -- Reading and importing data files -- Saving and exporting data files -- Data cleaning -- Labeling datasets -- Creating variables -- Combining datasets -- Processing observations across subgroups -- Changing the shape of your data -- Programming for data management: Part I -- Programming for data management: Part II -- Common elements.