UPC_YS_DOCUMENT 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 "BDS Document" 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_UPC_YS_DOCUMENT TYPE UPC_YS_DOCUMENT.
The UPC_YS_DOCUMENT table consists of various fields, each holding specific information or linking keys about BDS Document data available in SAP. These include DOC_TITLE (Document Title), DOC_SIZE (Business Document Service: Component size), DOC_TYPE (Business Document Service: MIME type), TO_CHAVL ()... 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. .