Reference: http://www.w3.org/TR/REC-html40/charset.html
Encodings from Get use ASCII Hexadecimal Representation
In the URL, keywords are seperated with plus signs ("+"). Real spaces, plus signs, and other illegal characters [who defines illegal characters?] are represented as hexadecimal ASCII
escape sequences (%##, e.g., space = %20, plus = %2B) (reference)
hello å there Α
Hexadecimal Representation
space = " " = " ", plus = "+" = "+", > =
">" = >
水 is chinese character for water
Decimal Representation
space = " " = " ", plus = "+" = "+", > =
"&62;" = ">"