Understanding Unicode
Hundreds of encoding system available to map characters to numbers
Unicode is widely accepted. This ensures support in multi platform without re-engineering.
Unicode is first defined in early 1990s.
To support non engligh languages, scientific special notations,
Unicode names of characters are written with all uppercase.
Ex: U+00B7
Important: While authoring XML, HTML you can use character reference of the form &#xnumber - eg: ℮