At present music manuscripts from the following archives and libraries are included into the RISM database: the Cathedral of Ljubljana, The Franciscan monastery in Novo mesto and the Chapter of Novo mesto, Episcopal Archives of Koper, including the music from the Cathedral (SI-Kš), the Provincial Archives and the Central Library of Srečko Vilhar, both in Koper, Parish Archives of Piran, and the Minorite Monastery in Piran. In the future the Slovenian group intends to add information on manuscripts from the Provincial Archives of Maribor, the Cathedral of Maribor, Episcopal Archives of Maribor, the Franciscan Monastery of Ljubljana, the Library of Ivan Potrč and the Parish Archives of Ptuj, the Chapter of Celje, etc. Results of the inventory of the Slovenian materials, together with the results of the inventories of other participating countries, are available online: http://opac.rism.info.

History of the project: Slovenian musicology started to collaborate with RISM in the late 1950s, when François Lesure started to correspond with the Head of the Music collection of the National and University library in Ljubljana. The result of these first Slovenian endeavours was the list of early music prints for the RISM A/I and B/I–II collections. The collaboration continued in the 1960s by compiling records on theoretical treatises (later included in the B/VI RISM volumes) and Italian opera libretti. In 1967 the work for RISM in Slovenia was taken over by Ivan Klemenčič and it intensified in the direction of cataloguing music manuscripts. By 1967 seven libraries and archives were included in the process of cataloguing. Up to 1980 about 1300 items were recorded in the traditional card index. With Klemenčič’s change of job, the RISM group for Slovenia moved in the 1980s to the Institute of Musicology where the cataloguing of music manuscripts continued, first in the form of fish catalogue and from 1993 in the frame of the electronic catalogue of the series A/II.