Vlad has suggested that the way the (built in) Books module operates is identical to the way users create dichotomous keys. With a bit of customization we might be able to create a template book that functions for creating biological taxonomic keys.
This sounds like a slight hack to create one. Personally, I'd prefer that, if this were a requirement posted by a number of users, we create our own module to create these keys.
I would however add that the book module is probably something that should be installed for users by default. It seems like a sensible way of creating the kind of hierarchical pages that a lot of the sites are evolving into.
Comments
Module would be better
This sounds like a slight hack to create one. Personally, I'd prefer that, if this were a requirement posted by a number of users, we create our own module to create these keys.
I would however add that the book module is probably something that should be installed for users by default. It seems like a sensible way of creating the kind of hierarchical pages that a lot of the sites are evolving into.