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+table t : { Id : int, Parent : option int, Nam : string }
+
+open TreeFun.Make(struct
+ val tab = t
+ end)
+
+fun row r = <xml>
+ #{[r.Id]}: {[r.Nam]}
+</xml>
+
+fun main () =
+ xml <- tree row None;
+ return <xml><body>
+ {xml}
+ </body></xml>