| Combining Diacritics |
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Unicode also contains many Precomposed Character s, so that in many cases it is possible to use both combining diacritics and precomposed characters, at the user's or application's choice. This leads to a requirement to perform Unicode Normalization before comparing two Unicode strings and to carefully design encoding converters to correctly map all of the valid ways to represent a character in Unicode to a legacy encoding to avoid data loss.For example, when converting between Windows-1258 and VISCII , the former uses combining diacritics whilst the other has a large selection of precomposed characters so a converter using a simple mapping between code values and Unicode code points will mess up text when converting between them. In Unicode, the main block of combining diacritics for European languages and the is a word processor notable for good handling of combining diacritics even when no predefined glyphs are present in the font. OPENTYPE OpenType has the ''ccmp'' "feature tag" to define glyphs that are compositions or decompositions involving combining characters. UNICODE RANGES
Codepoints U+0346–034A are IPA symbols, U+0346 : Dentolabial ; U+0347 : Alveolar ; U+0348 : strong Articulation U+0349 : weak articulation U+034A : Denasal Codepoints U+034B–034E are IPA diacritics for Disordered Speech : U+034B : nasal escape; U+034C : velopharyngeal friction; U+034D : labial spreading; U+034E : whistled articulation; U+034F is the " Combining Grapheme Joiner " (CGJ) and has no visible glyph Codepoints U+035C–0362 are Double Diacritics , diacritic signs placed across two letters. Codepoints U+0363–036F are medieval superscript letter diacritics, letters written directly above other letters appearing in medieval Germanic manuscripts, but in some instances in use until as late as the 19th century. For example, U+0364 is an ''e'' written above the preceding letter, to be used for Early Modern High German Umlaut notation, such as ''uͤ'' for Modern German ''ü''. TOOLS
NOTES SEE ALSO EXTERNAL LINKS
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