MPL_PART_AT_NODE 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 "Material at a Given PVS Node" 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_MPL_PART_AT_NODE TYPE MPL_PART_AT_NODE.
The MPL_PART_AT_NODE table consists of various fields, each holding specific information or linking keys about Material at a Given PVS Node data available in SAP. These include PNTEXT (External Key for a PVS Node (for BAPIs)), MATNR (Material Number), EXPL_GUID (Internal Number of the PVS Variant)... 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. .