The sorting functions in penman.model.Model accept a Branch and return a sort key. This is because they are used to rearrange trees. But so far they only use the role of a branch and not the target. While having the target available is more powerful, it may be unnecessary, and if we want to be able to sort triples during reconfiguration (see #52), it would be more useful to work only on the role as both branches and triples have roles.
There are some differences between branch roles and triple roles:
branch roles can be inverted
concept roles are :instance in triples and / in branches
The sorting functions in
penman.model.Modelaccept aBranchand return a sort key. This is because they are used to rearrange trees. But so far they only use the role of a branch and not the target. While having the target available is more powerful, it may be unnecessary, and if we want to be able to sort triples during reconfiguration (see #52), it would be more useful to work only on the role as both branches and triples have roles.There are some differences between branch roles and triple roles:
:instancein triples and/in branches