A free-form graph is hard to serialize. If the goal is to have the syntax close to the meaning, tree terms are simpler, and then graphs can be modeled on top of

A free-form graph is hard to serialize. If the goal is to have the syntax close to the meaning, tree terms are simpler, and then graphs can be modeled on top of them. As for lists of lists, the most recent article uses them for an in-memory optimized representation: http://natecull.org/wordpress/2018/08/16/dataspace-10-an-array-representation/ http://natecull.org/wordpress/2018/08/16/dataspace-10-an-arr...