In this slide the outline of my presentation can be seen:

• first I will present the DDL concept;
• after I will speak briefly on the protocol layers and the the interface unit architecture;
• after I will explain the development method which is based on the PSS-05 ESA software engineering standard;
• after I will list the main user requirements which were identified by using of PSS-05 standard;
• this will followed by the report of the design status;
• and at the end I will give the conclusions from the preparation phase of the project.