アノテーションデータ

構文	値
foo	@foo {}
foo("hello")	@foo {"value" : "hello"}
foo(bar=23)	@foo {"bar" : 23}
foo(baz="hello", zot=false)	@foo{"baz":"hello", "zot":false}

@[internal]

type AnnotationBase = @* {

 "$description" : string? ,

 "$predefined" : {*:any?}? ,

 * : any?

};
@[annotation]

type foo = @foo {

 "baz" : string,

 "zot" : boolean? 

} & AnnotationBase;