http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"Gale OneFile: Popular Magazines provides access to the most searched magazines across the OneFile products. All of the titles are selected based on actual publication searches performed by library patrons and the database includes many titles recommended by Bowker's "Magazines for Libraries.""-- Publisher description.