Oracle Application Server Discoverer Configuration Guide 10g (9.0.4)
11 Starting OracleAS Discoverer using URL parameters
11.1 Starting OracleAS Discoverer using URL parameters

To include other special characters in a URL, you must replace those characters with the
equivalent ASCII (or in some cases UNICODE) codes. This process is known as URL encoding. For
example, to replace a vertical bar ('|') you replace it with ~7c. Any characters not in the
following lists must be URL encoded:
* capital letters (i.e. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z)
* lower case letters (i.e. a b c d e f g h i j k l m n o p q r s t u v w x y z)
* numerals (i.e. 0 1 2 3 4 5 6 7 8 9)
* certain special characters (e.g. _ ! ~ ( ) * ' )
Discoverer uses a proprietary encoding mechanism that is similar to HTTP URL encoding, except that
Discoverer uses a tilde character (~) instead of a percent character (%). For more information
about URL encoding, refer to any standard HTML guide.

Hexadecimal Character Codes in URL
http://code.cside.com/3rdpage/us/url/converter.html

The Hebrew "alef" is %D7%90
http://server:port/discoverer/plus?...¶m_P_Ename=~D7~90