The Archives of Latvian Folklore began compiling the index of functional groups for charms in 1926. Kārlis Straubergs was also involved in the creation and arrangement of the index. Each unit of charm text was typewritten on a small piece of paper, and the pieces of paper were then grouped according to the functional use of the charms: erysipelas charms, colic charms, toothache charms, etc. However, the card index was never finished; work on it ceased as the political environment in Latvia changed following the Second World War and Soviet Occupation and the card index was never resumed. Currently, the index contains more than 19,000 charm units divided into 186 functional groups.