Entity:
	entityName='Sample' name=INTID '{'
	(attrList+=(DefinedAttribute|NonDefinedAttribute))*
	'}');

DefinedAttribute:
	name=[ValueAttributeDefinition] ':' value=INT;

NonDefinedAttribute:
       name=ID  ':' value=INT;

ValueAttributeDefinition:
	'Attribute' name=ID '{'
	'}';

    Attribute proper_attribute {
    }

    Sample 12234 {
         abc: 123
         proper_attribute: 456
    }

public Class<? extends ILinkingDiagnosticMessageProvider> bindILinkingDiagnosticMessageProvider() {
		return CustomLinkingDiagnosticMessageProvider.class;
}