URL BNF search part does not make sense
- by Asaf Mesika
Hi,
While implementing a Java regular expression for URL based on the URL BNF published by W3C, I've failed to understand the search part. As quoted:
httpaddress h t t p : / / hostport [ / path ] [ ?
search ]
search xalphas [ + search ]
xalphas xalpha [ xalphas ]
xalpha alpha | digit | safe | extra | escape
alpha 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 | A | B | C | D | E | F | G |
H | I | J | K | L | M | N | O | P | Q | R |
digit 0 |1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
safe $ | - | _ | @ | . | & | + | -
extra ! | * | " | ' | ( | ) | ,
Search claims it is xalphas seperated by a plus sign.
xalphas can contain plus signs by it self, as claimed by safe.
Thus according to my understanding , it should be:
search xalphas
Where am I wrong here?