code: private String unescape(String value)
      {
          StringBuilder result = new StringBuilder();
          for (int i = 0; i < value.length(); ++i)
          {
              char c = value.charAt(i);
              if (c == ESCAPE_PREFIX)
              {
                  String codeString = value.substring(i + 1, i + 3);
                  int code = Integer.parseInt(codeString, 16);
                  if (code < reservedChars.length && reservedChars[code] == code)
                  {
                      result.append(reservedChars[code]);
                      i += 2;
                  }
                  else
                  {
                      throw new ServiceLocationException("Unknown escaped character " + ESCAPE_PREFIX + codeString + " at position " + (i + 1) + " of " + value, SLPError.PARSE_ERROR);
                  }
              }
              else
              {
                  result.append(c);
              }
          }
          return result.toString();
      }
docs: Unescapes the scope string following RFC 2608, 6.4.1
  
  @param value The scope string to unescape
  @return The unescaped scope string
  @see #escape(String)