SDDLSFLIGHTTST_APP1 is an SAP Append structure so does not store data like a database table does but can be used to process "DD: Test for Extensions" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Append structure. These can then be used to store and process the required data appropriately.
i.e. DATA: wa_SDDLSFLIGHTTST_APP1 TYPE SDDLSFLIGHTTST_APP1 .
Below is the documentation avaialable and full details of the fields which make up this Append structure.
|Data Type||length (Decimals)||Check table||Description||Conversion Routine|