BAPI_PROJECT_DEF_LIST is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Project Definition for the BAPI Processing" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_BAPI_PROJECT_DEF_LIST TYPE BAPI_PROJECT_DEF_LIST.
The BAPI_PROJECT_DEF_LIST table consists of various fields, each holding specific information or linking keys about Project Definition for the BAPI Processing data available in SAP. These include PROJECT_DEFINITION (Project Definition)... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .