Combining Diacritical Marks Range (Unicode)
Last updated at 8:06 am UTC on 12 December 2015
The range: 0300–036F of The Unicode Standard contains diacritical marks which go after a base character.
In a combining character sequence, the base character is the initial character, which the combining marks are applied to.
For example, an é (e-acute) can be represented in a string as a single run e ("\u00e9") or an 'e' followed by an acute accent ("e\u0301" in NFD). According to the Unicode standard, these two are "canonically equivalent" and should be treated as equal. 
Character properties of U+0301 - combining acute accent