[antlr-interest] Ambiguities or resolving the rules

[Bharath R]

Hi All ,, Good morning. 
I m very new to ANTLR , I m facing a below problme like the second rule is
getting matched with the first rule and its not able to be parsed. 
 
This is my grammar 
 
grammar tel;
 
TEL : T E L COLON ; 
COLON : ':';
fragment T : ('t'|'T');
fragment E : ('e'|'E');
fragment L : ('l'|'L');
URI : TEL (parameter)*;
parameter : pname '=' pvalue ;
pname:ALPHA;
pvalue=ALPHA;
 
 
Now when I pass the value as "tel:airtel=provider" then the parser
validation fails, 
 
The exception got in " Mismatch character "=" expected ";"  " , this is like
for the input "tel:airtel=provider" the stream "tel" is taken and validated
for the rule "TEL"
But its expected to alphabets. 
 
 
Pls give ur suggestion on this.
 
Thanx a lot for reading this. 
Bharath R 
 
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