What is the name for the ordered relation between nodes?
For example: A color ontology represented in a trie has ordered color objects such that the marginal node between yellow and blue is green, and node between blue and green is teal, etc. I called this indexical.
I found that the term indexical is owned by linguistics (en.wikipedia.org/wiki/Indexicality). I had used the term indexical in academic presentations with a civil engineering audience that has more of a computer science awareness than usual -- nobody questioned my definition.
Searching online I found 'edit distance' and 'ordered.' Neither has the meaning I want.
In my presentation, I use the spork, the spoon and fork, as an example of a marginal object that requires a new node between spoon and fork (www.youtube.com/watch?v=ruJ76-o5lxU).
A broad example: Take every product in a grocery store and line them up, arrange those items with a closeness that represents their similarity. So, oranges and apples will be closer together than beef and fish. Which will both be closer together than to paper towels.
EDIT1: Revised the examples to any position between two points.
EDIT2: Simplified question.