This document lists all the requirements for the topic "User Groups". 

Why user groups?
Because we will have some functions that can only be used, if the user belongs to a special user group.

List of user groups

Unregistered User (short: "anonymous")

• anonymous visitor

Registeres User (short: "user")

• after registration (and confirmation) everybody gets into this group
• can supply new data (new data, modify data)

Moderator

• can review data which was supplied by a user

Administrator

• can change the user group of other users

Functionality

• an administrator can change the user group of other users (except of other administrators)
• a list of moderators can be viewed by every website visitor
• a list of administrators can be viewed by every website visitor