93 lines
4.3 KiB
Plaintext
93 lines
4.3 KiB
Plaintext
# Special Casing Properties
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#
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# This file is a supplement to the UnicodeData file.
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# It contains additional information about the casing of Unicode characters.
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# (For compatibility, the UnicodeData.txt file only contains case mappings for
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# characters where they are 1-1, and does not have locale-specific mappings.)
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# For more information, see the discussion of Case Mappings in the Unicode Standard.
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#
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# All code points not listed in this file that do not have a simple case mappings
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# in UnicodeData.txt map to themselves.
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# ================================================================================
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# Format
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# ================================================================================
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# The entries in this file are in the following machine-readable format:
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#
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# <code>; <lower> ; <title> ; <upper> ; (<condition_list> ;)? # <comment>
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#
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# <code>, <lower>, <title>, and <upper> provide character values in hex. If there is more than
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# one character, they are separated by spaces. Other than as used to separate elements,
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# spaces are to be ignored.
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#
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# The <condition_list> is optional. Where present, it consists of one or more locales or contexts,
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# separated by spaces. In these conditions:
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# - A condition list overrides the normal behavior if all of the listed conditions are true.
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# - The context is always the context of the characters in the original string,
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# NOT in the resulting string.
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# - Case distinctions in the condition list are not significant.
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# - Conditions preceded by "Not_" represent the negation of the condition.
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#
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# A locale is defined as:
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# <locale> := <ISO_639_code> ( "_" <ISO_3166_code> ( "_" <variant> )? )?
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# <ISO_3166_code> := 2-letter ISO country code,
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# <ISO_639_code> := 2-letter ISO language code
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#
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# A context for a character C is one of the following. This overrides Table
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# 3-13. Context Specification for Casing on p. 89 of The Unicode Standard,
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# Version 4.0.
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#
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# Definitions
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# - The property "cased" is defined in D47 on that same page (p. 89)
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# - A character C is defined to be "case-ignorable" if it meets either of the
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# following criteria:
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# A. The general category of C is Nonspacing Mark (Mn), or Enclosing Mark
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# (Me), or Format Control (Cf), or Letter Modifier (Lm), or
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# Symbol Modifier (Sk)
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# B. C is a MidLetter as defined in UAX #29
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# - A "case-ignorable sequence" is a sequence of zero or more case-ignorable
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# characters.
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#
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# A description of each context is followed by the equivalent regular
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# expression(s) describing the context before C and/or the context after C.
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# The regular expression uses the syntax of UTS #18, with one addition:
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# "!" means that the expression does not match. All regular expressions
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# below are case-sensitive.
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#
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# Context: Final_Sigma
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# Description: C is preceded by a sequence consisting of a cased letter and
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# a case-ignorable sequence, and C is not followed by a sequence consisting
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# of an ignorable sequence
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# and then a cased letter.
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# Before C: \p{cased} (\p{case-ignorable})*
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# After C: !( (\p{case-ignorable})* \p{cased} )
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#
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# Context: After_Soft_Dotted
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# Description: The last preceding character with combining class of zero before C was
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# Soft_Dotted, and there is no intervening combining character class 230 (ABOVE).
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# Before C: [\p{Soft_Dotted}] ([^{cc=230} {cc=0}])*
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#
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# Context: More_Above
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# Description: C is followed by one or more characters of combining class
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# 230 (ABOVE) in the combining character sequence.
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# After C: [^\p{cc=0}]* [\p{cc=230}]
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#
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# Context: Before_Dot
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# Description: C is followed by combining dot above (U+0307). Any sequence
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# of characters with a combining class that is neither 0 nor 230 may intervene
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# between the current character and the combining dot above.
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# After C: ([^\p{cc=230} \p{cc=0}])* [\u0307]
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#
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# Context: After_I
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# Description: The last preceding base character was an uppercase I, and
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# there is no intervening combining character class 230 (ABOVE).
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# Before C: [I] ([^\p{cc=230} \p{cc=0}])
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#
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# Parsers of this file must be prepared to deal with future additions to this format:
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# * Additional contexts
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# * Additional fields
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# ================================================================================
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# ================================================================================
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# Unconditional mappings
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# ================================================================================
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