COBL_OBJNR_EX 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 "Object Numbers from Coding Block: External Representation" 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_COBL_OBJNR_EX TYPE COBL_OBJNR_EX.
The COBL_OBJNR_EX table consists of various fields, each holding specific information or linking keys about Object Numbers from Coding Block: External Representation data available in SAP. These include SWENR (Site Number), SGENR (Building Number), SGRNR (Property Number for BE), SMENR (Number of Rental Unit)... 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. .