Lists data fields that differ from the last major version (see versions above). Inherited differences in locales are suppressed, except where the source locales are different.
| Section | Page | Header | Code | Old | New |
| BCP47 | u_Extension | mu | deprecated | ▷missing◁ | false |
| description | ▷missing◁ | Allows setting overrides for measurement units. Currently limited to quantity=temperature, and no provision for usage or size. |
| mu-celsius | _deprecated | ▷missing◁ | false |
| _description | ▷missing◁ | temperature unit is Celsius |
| mu-fahrenhe | _deprecated | ▷missing◁ | false |
| _description | ▷missing◁ | temperature unit is Fahrenheit |
| mu-kelvin | _deprecated | ▷missing◁ | false |
| _description | ▷missing◁ | temperature unit is Kelvin |
| nu-kawi | _deprecated | ▷missing◁ | false |
| _description | ▷missing◁ | Kawi digits |
| nu-nagm | _deprecated | ▷missing◁ | false |
| _description | ▷missing◁ | Nag Mundari digits |
| tz-uaiev | _alias | … | Europe/Kiev Europe/Kyiv |