http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a classification of narrative elements in folk-tales, ballads, myths, fables, mediaeval romances, exempla, fabliaux, jest-books, and local legends
"This study is also issued as Indiana University studies nos. 96-97, 100-101, 105-106, 108-112."