CMS_STR_CONTROLLER_DATA 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 "UI controller : Data Structure" 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_CMS_STR_CONTROLLER_DATA TYPE CMS_STR_CONTROLLER_DATA.
The CMS_STR_CONTROLLER_DATA table consists of various fields, each holding specific information or linking keys about UI controller : Data Structure data available in SAP. These include EVENT_GET_UIP (Get UI Parameters Function Module Name), FLD_MAINTAIN (Table Field Name for Activity Type Maintain), FLD_CREATE (Table Field Name for Activity Type Create)... 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. .