Header: x=INT y=INT;

terminal INT returns ecore::EInt: ('1'..'9')* ('0'..'9');

grammar org.graphstream.DGS hidden(WS)

generate dGS "h ttp://www.graphstream.org/DGS"

import "h ttp://www.eclipse.org/emf/2002/Ecore" as ecore

Dgs: header=Header (event+=Event | comment+=COMMENT | EOL)*;

Header: magic=MAGIC EOL name=(ID | STRING) numberOfSteps=INT numberOfEvents=INT EOL;

terminal MAGIC: 'DGS003'|'DGS004';

Event: (an=An|cn=Cn|dn=Dn|ae=Ae|ce=Ce|de=De|cg=Cg|st=St|cl=Cl) (comment=COMMENT | EOL);

An: 'an' idNode=(ID | STRING) attributes=Attributes;
	
Cn: 'cn' idNode=(ID | STRING) attributes=Attributes;
	
Dn: 'dn' idNode=(ID | STRING);
	
Ae: 'ae' idEdge=(ID | STRING) idNode1=(ID | STRING) (direction=DIRECTION)? idNode2=(ID | STRING) attributes=Attributes;
	
Ce: 'ce' idNode=(ID | STRING) attributes=Attributes;
	
De: 'de' idEdge=(ID | STRING);
	
Cg: 'cg' attributes=Attributes;
	
St: 'st' real=Real;

terminal Cl: 'cl';

Attributes: {Attributes} (attribute+=Attribute)*;
	
Attribute: ('+'|'-')? idAttribute=(ID | STRING) (assign=ASSIGN value=Value (',' otherValues+=Value)*)?;
	
Value: (string=STRING | real=Real | array=Array | map=Map);
	
Array: {Array} '{' (value=Value (',' otherValues+=Value)*)? '}';
		
Map: '[' mapping=Mapping (',' otherMapping+=Mapping)* ']';

Mapping: id=(ID | STRING) assign=ASSIGN value=Value;

terminal DIRECTION: '<'|'>';
	
terminal ASSIGN: '='|':';

terminal COMMENT: '#' -> EOL;

Real returns ecore::EDouble: INT ('.' ('0')* INT)?;

terminal INT returns ecore::EInt: ('1'..'9')* ('0'..'9');

terminal STRING returns ecore::EString: '"' ( '\\' ('b'|'t'|'n'|'f'|'r'|'u'|'"'|"'"|'\\') | !('\\'|'"') )* '"';

terminal ID returns ecore::EString: ('a'..'z' | 'A'..'Z' | '0'..'9')+;

terminal EOL: ('\r')? '\n';

terminal WS: (' '|'\t')+;

DGS004
null 0 0

INT returns ecore::EInt: ZERO | (DIGIT (DIGIT|ZERO)*);

Real returns ecore::EDouble: DIGIT (DIGIT|ZERO)+ ('.' (DIGIT|ZERO)+)?;

ID returns ecore::EString: (ZERO|DIGIT|ALPHA)+;

terminal ZERO : '0';
terminal DIGIT : '1'..'9';
terminal ALPHA : ('a'..'z' | 'A'..'Z')+;