Module page https://www.drupal.org/project/entity_hierarchy Module tags Extension Tags Structure Information Architecture Entity Reference Create entity hierarchies. Manage children on children tab. Can create siblings, but not descendants. New 5.x version has new architecture, alpha release. Module issues Add a tree editor for the whole hierarchy Implement Page with Draggable Hierarchy Tree Add possibility of adding existing children from the "Children" tab Related issues Support Entity Hierarchy Document how to use DraggableViews with Entity Reference Hierarchy Provide an entity hierarchy API Related modules Add Child Page Views Tree