Category Group
Category Group: a group of categories, with the category indicator that says what kind of cost or revenue they are.
Category
Category: an expense, project or service category, with the accounts, tax groups and prices that come with it.
Line Property
Line Property: a property of a service line that says whether it can be billed.
Category Pricing
Category Pricing: prices per category, project and resource for a pricing period. Nothing uses it today.
Category Pricing Period
Category Pricing Period: a named period for category pricing. Nothing uses it today.