MusicXML

2.1 Licensing Changes

MusicXML 3.1 is now licensed under the W3C Community Final Specification Agreement rather than the MusicXML Public License 3.0. (Issue 114)

2.2 Packaging Changes

MusicXML 3.1 now recommends .musicxml rather than .xml as the file extension for uncompressed MusicXML files. (Issue 191)

MusicXML 3.1 adds a new file called mimetype as the first file in the zip container of a compressed MusicXML file. The file is uncompressed and has the string application/vnd.recordare.musicxml as its content. (Issue 185)

MusicXML 3.1 files now have recommended Uniform Type Identifiers. (Issue 50)

2.3 Schema Additions

MusicXML 3.1 adds new features to MusicXML 3.0 score-partwise and score-timewise documents. These changes are included in the musicxml.xsd and to30.xsl files, as well as the following DTD module files.

2.4 Removed and Deprecated Features

• The font-family, font-size, font-style, and font-weight attributes have been removed from the extend element in the note.mod and musicxml.xsd files. The extend element contains no text, and these attributes were added by mistake in MusicXML 1.1. (Issue 140)
• The bezier-offset and bezier-offset2 attributes in the common.mod and musicxml.xsd files are deprecated as of MusicXML 3.1. (Issue 26)

2.5 Documentation Changes

MusicXML 3.1 made the following changes to the XSD and DTD schema documentation.

• The DTD documentation for the actual-notes and normal-notes elements has been corrected to fix a typo. (Issue 138)
• The XSD and DTD documentation for the accordion-high, accordion-low, and accordion-middle elements clarifies that the elements are omitted if no dots are present. (Issue 134)
• The XSD and DTD documentation for the attack and release attributes and their interrelationship has been clarified. (Issue 58)
• The XSD and DTD documentation for the bezier-x, bezier-y, bezier-x2, bezier-y2, bezier-offset, and bezier-offset2 attributes and their interrelationships has been clarified. (Issue 25, Issue 26)
• The cancel complex type XSD documentation now describes the location attribute correctly. (Issue 18)
• The cue element XSD and DTD documentation clarifies that the cue element indicates silent notes. (Issue 67)
• The direction element XSD and DTD documentation clarifies the relationship between direction and note elements. (Issue 170)
• The falloff element XSD documentation has been corrected to indicate the falloff comes after the note. (Issue 17)
• The interchangeable complex type XSD documentation no longer refers to a non-existent parentheses attribute. (Issue 12)
• The key-octave element XSD and DTD documentation clarifies the behavior of the cancel attribute. (Issue 126)
• The multiple-rest complex type XSD documentation no longer refers to a non-existent type attribute. (Issue 15)
• The note-type complex type XSD documentation now refers to 1024th to maxima instead of 256th to long. (Issue 16)
• The number-level simple type XSD documentation now refers to an optional rather than implied value. (Issue 19)
• The string-number simple type and string element XSD and DTD documentation clarifies how string numbers are ordered. (Issue 127)
• The tied element XSD and DTD documentation clarifies how to represent different types of single-ended tie symbols. (Issue 142)
• The wavy-line XSD and DTD documentation now refers to barline rather than measure elements. (Issue 13)

The history of all the changes from MusicXML 3.0 to MusicXML 3.1 can be found in the GitHub issue list for the v3.1 milestone.