This applies to both books and scores. The existence of a plus or double plus sign does not make the call number unique.
Non-plus = less than or equal to 26 cm. in any direction (height or width)
Plus = equal to or more than 27 cm. and up to or equal to 36 cm. in any direction (height or width)
Double-plus = equal to or more than 37 cm. in any direction (height or width)
The class numbers for sonatas for piano, violin, and violoncello are further subdivided:
|All sonatas by one composer||Selected sonatas by one composer||Individual sonatas by one composer|
|M23||piano sonatas||M219||violin and piano sonatas||M231||cello and piano sonatas|
|M23.3||selected piano sonatas||M219.3||selected violin and piano sonatas||M231.3||selected cello and piano sonatas|
|M23.5*||individual piano sonatas||M219.5*||individual violin and piano sonatas||M231.5*||individual cello and piano sonatas|
* Practice varies, but M23.5, M219.5, and M231.5 are used even when the composer has written only one sonata for that medium.
M175.X6: music for xylophone, marimba, vibraharp, vibraphone is divided into two separate class numbers:
M175.X6: xylophone, vibraharp, vibraphone
Application of this practice has varied in the past. Marimba music can be found in both M175.X6 and M175.X9.
The class number for individual composer biography and criticism and interpretation is further divided:
|A101||= Writings, collected and selected|
|A104||= Single literary works|
|A105||= Anniversaries, festivals, congresses, etc.|
|A107||= Memorial volumes|
|A109||= Documents, interviews, etc.|
For exhibitions about a composer, use ML141. Cutter by city of exhibition, then by composer (one number only), e.g., ML141 P898 M9 for an exhibition about Mozart in Prague).
The Yale University Music Library uses the Cutter-Sanborn Three-Figure Author Table as the source for cutter numbers.
- The Yale Music Library does not use decimal points in the cutter number:
M939 not .M939
- If a name or word falls between two cutter numbers, use the lower number:
° The name Stankovíc falls between Stanh S786 and Stanl S787. Because "k" comes after "h" but before "l," use the lower number: S786.
- Cutter a vowel with an umlaut as that vowel followed by an "e":
° Because the name Boëly has an umlaut, it should be cuttered as "boeely," making it fall between Boe B669 and Boeh B671. Because "e" comes before "h," the lower number, B669 is used.
° If the umlaut had not been in the name, it would have been cuttered as "boely," falling between Boeh B671 and Boer B672.
- Cutter a surname with more than one element as one word:
|Henry-Louis de La Grange||La Grange||lagrange (lagr = L178)||la grange (la = L111)|
|John La Montaine||La Montaine||lamontaine (lamon = L234)||la montaine (la = L111)|
|Helga de la Motte-Haber||De la Motte-Haber||delamotte (delam = D336)||de la motte (de = D278) or la motte (la = L111)|
|Carl Van Wyk||Van Wyk||vanwyk (vanw = V285)||van wyk (van = V217)|
° The cutter table jumps from "mazzon" (478) to "me" (479), with no intervening "mc," so it would be difficult to cutter all names beginning with "McC" in M478.
When a class number is subarranged or cuttered the cutter number may be found in Class M (or determined by using the LC cutter table) or may be established by using the Cutter-Sanborn Three-Figure Author Table. The sections below indicate when to use the cutter number given in Class M and when to use the Cutter-Sanborn Three-Figure Author Table, even when a cutter number is given in Class M.
Class numbers that are cuttered by instrument or topic:
Use the cutter numbers, when required and given, in Class M (or determined by using the LC cutter table) for the following classes:
All class numbers from M1-M2191
By person: Use the cutter number already established for this person:
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | V | W | XYZ or the Cutter-Sanborn Three-Figure Author Table for the composer, performer, etc. followed by a cutter number for main entry if needed in classes:
By instrument or topic: Use the cutter number already established for the topic or the Cutter-Sanborn Three-Figure Author Table for the following classes:
By place: Use the Cutter-Sanborn Three-Figure Author Table to establish cutter numbers when any class can be specified by country or, following the table for ML198+, by state, province, etc., or city: