how to handle list definitions

[ekuw]

We need to discuss how we want to deal with the declaration of variables within the package. The aim would be to have no hardcoded strings buried anywhere in R/*R. These should where ever possible be factored out and defined in a single place. I've started working towards having these defined on-load, but there are cases where these lists/variables may need to be edited by users.

To discuss:

• which variables are most likely to need to be changed by users?
• same question, but for developers
• which functions do we routinely expect to see users call directly?