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/**
* Define a grammar called AAIDsl
*/
grammar AAIDsl;
aaiquery: dslStatement;
dslStatement: (singleNodeStep ) (traverseStep )* limitStep*;
unionQueryStep: LBRACKET dslStatement ( COMMA (dslStatement))* RBRACKET;
traverseStep: (TRAVERSE ( singleNodeStep | unionQueryStep));
singleNodeStep: NODE STORE? (filterStep | filterTraverseStep)*;
filterStep: NOT? (LPAREN KEY (COMMA (KEY | NODE))* RPAREN);
filterTraverseStep: (LPAREN traverseStep* RPAREN);
limitStep: LIMIT NODE;
LIMIT: 'LIMIT';
NODE: ID;
KEY: ['] (ID | ' ')* ['] ;
AND: [&];
STORE: [*];
OR: [|];
TRAVERSE: [>] ;
LPAREN: [(];
RPAREN: [)];
COMMA: [,] ;
EQUAL: [=];
LBRACKET: [[];
RBRACKET: [\]];
NOT: [!];
VALUE: [DIGIT]+;
fragment LOWERCASE : [a-z] ;
fragment UPPERCASE : [A-Z] ;
fragment DIGIT : [0-9] ;
ID
: ( LOWERCASE | UPPERCASE | DIGIT) ( LOWERCASE | UPPERCASE | DIGIT | '-' | '.' | '_' | '/')*
;
WS : [ \t\r\n]+ -> skip ; // skip spaces, tabs, newlines
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