/* A.6 URI character classes */

uri:
	(uriCharacters)?
	;

uriCharacters:
	uriCharacter (uriCharacters)?
	;

uriCharacter:
	uriReserved
	| uriUnescaped
	| uriEscaped
	;

uriReserved:
	SEMI | SLASH | QUESTION | COLON | AT | AMPER | EQ | PLUS | DOLLAR | COMMA
	;

uriUnescaped:
	uriAlpha
	| decimalDigit
	| uriMark
	;

uriEscaped:
	PERCENT hexDigit hexDigit
	;

uriAlpha:
	ALPHA_CHARACTER /* consists of a-zA-Z */
	;

uriMark:
	MINUS | UNDERSCORE | DOT | EXCLAMATION | TILDE | ASTERISK | APOSTROPHE | LPAREN | RPAREN
	;

ALPHA_CHARACTER
	:	('a'..'z')|('A'..'Z');
LOWER_ALPHA_CHAR
	:	('a'..'z');

UPPER_ALPHA_CHAR
	:	('a'..'z');