Proposed Call Number Schemes
- Be easy to sort, employing as few rules as possible (eg., all numbers are sorted numerically, not some numerically and some digit-by-digit)
- Not be too verbose
- Break easily when typed into a narrow column
- Be reducible to a URL easily
- Possible: Include a checksum? (timspalding proposal)
- Easily fit on a label in readable size
 PROPOSED CALL NUMBER SCHEMES
- "1" used as "any 0-9 digit"
- "0" used as "any number"
- "A" used as "any letter"
- Parentheses indicate optional elements
- "[...]" indicate continuation along the same pattern
What about cutter numbers (authors and subtopics)?
- Ip scheme
- where 0 is... (what range?)
- dividers/subdividers? proposed: "#", "@", "/", "<", ">"
- DDC scheme or variation
- LoC-DDC mixed scheme
- A(A) 1[...].1[...]
(FACETS) (CALL NUMBER)
The first letter is audience (A, adult, Y, young adult, C, children's) The second letter is format (B, book, A, audio, G, graphic-novel, etc.) Other facets could be for whatever else needs to be called out—language, special collection, etc.
And so you have
- AB 123.321 - Lost Moon
- AA 123.321 - Lost Moon in an audio format
- CA 123.321 - Goodnight Moon
A library that had no childrens' books would ignore the first facet. A library entirely of Braille books would ignore the second.
- Top Down Scheme
- The call number would start with something that indicated which top-level category it belonged to. Here are some of the top level categories proposed, and I'm sticking a three-letter code in for each one. First letter is always capitalized. Second and third letters are lowercase if they are part of the first word of the top level category, or capital if they are the first letter of a subsequent word.
- Agriculture: Agr
- Anthropology& Sociology:AnS
- Antiques & Collectibles: AnC
- Art: Art
- Biography & Autobiography: BiA
- Business: Bus
- Career: Car
- Computers: Com
- Crafts & Hobbies: CrH
- This way the call number you see directly reinforces the top-level categorization you are working from. It can teach you about the shelving system, but it can also function as a simple code for shelf order.