Standard Music Font Layout (SMuFL)
Version 1.25 (2017-10-25)
SMuFL is a specification that provides a standard way of mapping the thousands of musical symbols required by conventional music notation into the Private Use Area in Unicode’s Basic Multilingual Plane for a single (format-independent) font.
The goal of SMuFL is to establish a new standard glyph mapping for musical symbols that is optimised for modern font formats and that can be adopted by a variety of software vendors and font designers, for the benefit of all users of music notation software.
This specification is maintained by the W3C Music Notation Community Group. Please consult that page for further details. The group is chaired by Michael Good, Joe Berkovitz, and Daniel Spreadbury.