PSARC_MSG_CATA 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 "ALV Catalogue structure for PS archiving report" 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_PSARC_MSG_CATA TYPE PSARC_MSG_CATA.
The PSARC_MSG_CATA table consists of various fields, each holding specific information or linking keys about ALV Catalogue structure for PS archiving report data available in SAP. These include PS_PROJ (Project Definition), PS_OBJECT (Object type), PS_OBJ_ID (Precheck Archiving report Object Identifier), PS_OBJ_TEXT (PS: Short description (1st text line) in all caps)... 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. .