Chapter 3. User Interface
Zero Exchange UI is a set of web pages. Let's consider most important of them.
- About page should contain information about the project goal and contacts of the administration. Unauthorized access is allowed.
    
- Cabinet page allows user to maintain personal data, communicate with partners and provide them with the credit lines to be used while collaboration debts balancing using Ripple approach.
    
- Collaboration page dispays active contracts and personal resources. Registered users can add new contracts and join existing ones.
    
The following diagram acquaints you with the top-level web user interface structure.
    
    
Below you can see the more detailed use case diagram.