Hi there, is it possible to specify a constraint that applies ONLY when a node has no incoming relationships?
In this case, I use graphs to represent a taxonomy. All nodes in a taxonomy have label Taxon, including the root node. The root node in a taxonomy is only distinguished by the fact that it has no incoming relationships. I want the property
name to be unique for these root nodes. But I don't want that uniqueness constraint to apply to nodes that are further down the taxonomy tree.