Convert (escape) a string containing reserved characters into a valid Uniform Resource Locator (URL).
Functions: ESCAPE Function Returns a URL with illegal characters (and optionally reserved characters) escaped using the %2-digit-hex-code format UNESCAPE Function Unescapes the escape character sequences to their original forms in a URL. Convert the %XX escape character sequences to the original characters
For full documentation of the packaged procedures
above see the Oracle Manual:
"Oracle9i Supplied PL/SQL Packages and Types Reference"
or the book Oracle Built in Packages by Steven Feuerstein et al