This is only a visualysation from Ratel what matters is he JSON result. Is kind of impossible predict de usability from all users. So if you need to see the visualisation lableled just use the field “Enter regex for labels”. And for example use “hostname” but hostname need to have some data. Like a string. You can put any predicate there.
after my test , I found that the dgraph-ratel will show the predicates like ‘%name’
i change ipvalue to ipname ,then it is shown in the web ,i think you should add this rule to your official documents? isn’it ?