sentences:  In general, the code points of truly identical characters (which can be rendered in the same way in Unicode fonts) are defined to be canonically equivalent.For consistency with some older standards, Unicode provides single code points for many characters that could be viewed as modified forms of other characters (such as U+00F1 for "ñ" or U+00C5 for "Å") or as combinations of two or more characters (such as U+FB00 for the ligature "ﬀ" or U+0132 for the Dutch letter "IJ")
  
  For consistency with other standards, and for greater flexibility, Unicode also provides codes for many elements that are not used on their own, but are meant instead to modify or combine with a preceding base character.Examples of these combining characters are the combining tilde and the Japanese diacritic dakuten ("◌゛", U+3099).