I'm trying to think of how to convert something I can imagine graphically into a format I can put in a database.
For instance, say I have a piece of chain, made up of 4 individual links, each painted a different color. The first link in the chain is red, the next blue, the third link is green and the fourth is yellow. I have a rule that says I must maintain those relative positions, even if I add or remove links from the chain. (So, I can create a longer chain of red, purple, blue, green, yellow, orange, or a shorter chain of red, blue, yellow.) Furthermore, any new links, once added, have to preserve their relative order to all other links.
Is this possible to translate into the sorting of records in Filemaker?
Comment, please forgive me if I've restated what you've already described with your "Precedences" table above.