From where can I get Grapheme Cluster combining rules
<p>I have successfully identified grapheme cluster boundary in javascript.Now I want to know from where and how can I get the data about grapheme clusters getting combined to form a visible display character.</p>

<p>Is this data about what grapheme clusters combining to form one display character , present in  font file or in unicode data files.</p>

<p>any pointers will help. 
To rephrase I want to know how Tailored grapheme clusters are handled. </p>

<p>to create क्षि in Hindi following are combined
( क ) devanagari letter ka
( ् ) devanagari sign virama
( ष ) devanagari letter ssa
( ि ) devanagari vowel sign i</p>

<p>Thanks in advance,</p>
