BUS_EI_COM_INSTANCE 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 "Com. Interface: ID and GUID of a Business Partner" 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_BUS_EI_COM_INSTANCE TYPE BUS_EI_COM_INSTANCE.
The BUS_EI_COM_INSTANCE table consists of various fields, each holding specific information or linking keys about Com. Interface: ID and GUID of a Business Partner data available in SAP. These include BPARTNERGUID (Com. Interface: Business Partner GUID), IDENTIFICATIONCATEGORY (BP Identification Category), IDENTIFICATIONNUMBER (Identification Number)... 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. .