1. If nodes are connected with an edge, these nodes should be at the top of the dropdowns for completion and locked. 2. The description of a node should support markdown. 3. A resource could also be a physical book. A book needs a name (Lambacher Schweitzer GK) and a location (for example S. 223 Nr. 5) 4. Do not use Concert One for the description of a node, since it is harder to read. 5. Do not draw a border around an edge if it is selected, the color of the edge should change. 6. Do not select edges, when using multiple selection. 7. An edge should be deletable with the keyboard just like a node.
