BBPS_ATT_PUB_EXT 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 "Transfer of Attachments (External)" 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_BBPS_ATT_PUB_EXT TYPE BBPS_ATT_PUB_EXT.
The BBPS_ATT_PUB_EXT table consists of various fields, each holding specific information or linking keys about Transfer of Attachments (External) data available in SAP. These include E_PORT (Extranet Port for Publishing of Attachments), E_DIRECTORY (Extranet Directory for Publication of Attachments), E_HOST_READ (Extranet Host for Publication of Attachments), E_PORT_READ (Extranet Port for Publishing of Attachments)... 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. .