Unicode 3.1.1

Unicode 3.1.1 is an update version of Unicode 3.1. It does not contain character additions or major normative changes. The following describes the textual updates that have been made. A complete specification of the contributory files is found on Enumerated Versions.

• UCD Files
  • ArabicShaping.txt
    • adds description of types T and U
    • fixes U+200D ZERO WIDTH JOINER
    • fixes shaping for U+06D5 AE
  • Derived*.txt, DerivedProperties.html
    • regenerates derived files
    • DerivedBidiClass.txt (mistakenly omitted from V3.1.0)
    • adds type T to DerivedJoiningType.txt
  • CaseFolding.txt
    • fixes typo inside comment line
  • EastAsianWidth.txt
    • moves 15 characters from "N" to "A" status
  • NormalizationTest.txt
    • fixes 9 errors that affect conformance tests
  • PropList.txt, PropList.html
    • fixes to hex digits
  • SpecialCasing.txt
    • fixes sigma casing and some dot-above cases
  • Unihan.txt
    • adds newest cross-mappings

In addition:

• Enumerated Versions of the Unicode Standard has been modified to include specific citation text for each version (3.0 or later). This text allows people to simply cut and paste the citation text for each version without consulting Citations for the right format.
• Versions of the Unicode Standard has been modified to include more information about the enumerated versions page, and formats for references to The Unicode Standard, to Unicode Technical Annexes, and to other Unicode Technical reports.
• New Sample Code is available for UTF conversions.
  • it is updated to latest UTF-8 corrigendum
  • it adds legality checking options
  • it adds a test harness