In digital typography, the Medieval Unicode Font Initiative (MUFI) is a project which aims to coordinate the encoding and display of special characters in medieval texts written in the Latin alphabet, which are not encoded as part of Unicode.
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MUFI was founded in July 2001 by a workgroup consisting of Odd Einar Haugen (Bergen), Alec McAllister (Leeds), and Tarrin Wills (Sydney). From 2006 to 2015, MUFI had a board of four members, consisting of the three founding members and Andreas Stötzner (Leipzig). As of 2016, Tarrin Wills is the single board member.
In medieval texts, many special ligatures, scribal abbreviations, and letter forms existed, which are no longer a part of the Latin alphabet. As few of these characters are encoded in Unicode, ligatures have to be broken up into separate letters when digitized. Since few fonts support medieval ligatures or alternative letter forms, it is difficult to transmit them reliably in digital formats.
To prevent the possibility of corruption of the source texts, the eventual goal of the MUFI is to create a consensus on which characters to encode, and then present a completed proposal to the Unicode authorities. In the meantime, a part of the Private Use Area has been assigned for encoding, so these characters can be placed in typefaces for testing and to speed up the later transition to the final encodings (if the project is accepted). This was originally based upon work done by the TITUS project, which also deals with Greek, Cyrillic, Georgian, Arabic and Devanagari characters, As of Unicode 5.1, this proposal has been made, covering 152 characters, and most of these (89 in all) have been encoded in the Latin Extended-D block. Others are in the Combining Diacritical Marks Supplement (26 chars.), Latin Extended Additional (10 chars.), Supplemental Punctuation (15 chars.) and Ancient Symbols (12 chars.).
LeedsUni supports all of MUFI 2.0. Caudex, which is available at Google Fonts for embedding, claims to support most of MUFI 3.0, but is not listed on the MUFI homepage.Alphabetum has an almost complete coverage of MUFI 2.0 and some coverage of version 3.0, in addition to a complete coverage of MUFI 1.0.
TITUS Cyberbit covers all of MUFI 1.0 and includes some additional characters at different places, as it predates the MUFI project.
The MUFI set includes standardized characters from many areas in the Basic Multilingual Plane and includes named character references ("entities") for use in SGML and XML, especially in TEI formats such as Menota. It also specifies many characters that are not encoded in Unicode, yet, in the Private Use Area which is designated for such use. When MUFI PUA characters have been accepted for encoding they are removed from the PUA in subsequent versions. As of version 4.0 there are the following PUA assignments, organized into several sub-areas.
Similar initiatives have been founded for Early Cyrillic Symbols (Cyrillic Font Initiative, CYFI) and others. They are coordinated in the Linguistic Corporate Use Area (LINCUA). UNZ is a set compatible with MUFI, but it is not a true subset since it contains PUA additions of its own. It is intended for blackletter fonts, their typographic ligatures in particular.