[antlr-interest] VCard parser

[Andreas Volz]

Hello,

I'm just starting with ANTLR and try to build a VCard parser. This is
the data I like to parse:

BEGIN:VCARD
VERSION:3.0
N:Mustermann;Max
FN:Max Mustermann
ORG:Wikipedia
URL:http://de.wikipedia.org/
EMAIL;TYPE=INTERNET:max.mustermann at example.org
TEL;TYPE=voice,work,pref:+49 1234 56788
ADR;TYPE=intl,work,postal,parcel:;;Musterstraße 1;Musterstadt;;12345;Germany
END:VCARD

My very first try is this:

grammar VCard;

BEGIN	:	'BEGIN:VCARD';

END	:	'END:VCARD';

VCARD	:	BEGIN LINE+ END;

LINE	: 	KEY DP VALUE;

KEY	:	~':';

DP 	:	':';

VALUE	:	('a'..'z' |'A'..'Z' )+;


But this is only a first step. I couldn't get a more complex rule to work,

A problem that I open get is the message:

"The following token definitions can never be matched because prior tokens
 match the same input"

Even if I don't use that token somewhere, Could anyone maybe explain me why
this very simple grammar doesn't work:

grammar test;

KEY	:	('a'..'z' |'A'..'Z' )+;

VALUE	:	('a'..'z' |'A'..'Z' )+;

LINE	:	KEY '=' VALUE;

=> "The following token definitions can never be matched because prior tokens 
match the same input: VALUE"

How would I do this very simple key/value example?

regards
Andreas