Accumulo lexicographical order

[Cornish, Duane C.]

Accumulo Users,

I know Accumulo keys are sorted in lexicographical order in the tables.  Where 
can I find the specification defining that order?  For example, what 
lexicographical order are symbols in?  Is the order the same as the numerical 
order of UTF-8 encoding, ASCII encoding, or some other encoding scheme?

Thanks in advance,
Duane Cornish