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Encyclopedia > Precomposed character

Precomposed character is a Unicode entity that can be decomposed into a canonically equivalent string of several other characters. Typically, a precomposed character is decomposed into to the main character and a combining diacritical mark.


Syn: decomposable character


On most computer systems with incomplete Unicode support, the precomposed characters are easier to handle, and also they look better on displays and in print.


See Table of Unicode precomposed characters


See also: canonical equivalence, canonical decomposition


  Results from FactBites:
 
Precomposed character - definition of Precomposed character in Encyclopedia (97 words)
Precomposed character is a Unicode entity that can be decomposed into a canonically equivalent string of several other characters.
Typically, a precomposed character is decomposed into to the main character and a combining diacritical mark.
On most computer systems with incomplete Unicode support, the precomposed characters are easier to handle, and also they look better on displays and in print.
Combining character - Wikipedia, the free encyclopedia (264 words)
So in many cases it is possible to use both combining diacritics and precomposed characters, at the user or applications choice.
This leads to a requirement to perform unicode normalisation 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.
  More results at FactBites »

 
 

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