isFruit.txt linked too from the *.ntlist index example could be as simple as:

apple

pair

orange

strewbury

banana

tomato

Thats is! Just a text file list of words. They could be full URIs, but here they are assumed to be local to the server. (so domain#apple,domain#pair etc).

The predicate/value is defined by the ntlist, not here. Its thus just a list of subjects that conform to that pair.