change_element_type

Change the type of existing nodes or relationships in place. Each element keeps its id, description, tags and diagram placements. Property values carry over when the new type has a property with the same name and data type, and relationships are kept when the new type is allowed to have them. If any element would lose a relationship or a filled-in value, the whole call is refused and nothing changes; the error names what would be lost. Pass allow_lossy=true to go ahead anyway. A clash of auto-IDs, or an element tied to a simulation agent or link, always blocks the change. Send the whole reorganisation in one call. An autosave version is saved first, and the change is undoable.

{"elements": [{"element_id": "REQ-42", "new_type": "Feature"}, {"element_id": "REQ-43", "new_type": "Feature"}]}