function
| Library: UTF-8 (OMUTF8) Import : omutf8.xmd | Returns:  A  | 
export string function 
        encoding of                  value integer             code-point
                 invalid-code-points value error-handling-type invalid-code-points optional
    
 The function utf8.encoding converts an integer containing a Unicode character code to a
        string of bytes containing the UTF-8 encoding of that character code. 
If the argument  invalid-code-points is unspecified (or specified as not-allowed, which is the default value), invalid values will
cause utf8.encoding to  return the UTF-8 encoding of U+FFFD (which happens to be 0xEFBFBD). If the argument is specified as
not-allowed-with-throw, invalid values will cause utf8.encoding to throw to utf8.invalid-code-point. If the argument is specified as allowed the result may not be valid UTF-8.
      
 The following program converts a long character encoding (2 bytes per character) to a UTF-8 encoding:
        
import "omutf8.xmd" prefixed by utf8. process submit #main-input find any{2} => char output utf8.encoding of binary char