CMS_STR_TEXT_ID 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 "Structure: Text ID" 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_TEXT_ID TYPE CMS_STR_TEXT_ID.
The CMS_STR_TEXT_ID table consists of various fields, each holding specific information or linking keys about Structure: Text ID data available in SAP. These include TEXT_ID_TEXT (Short Text), LANGUAGE (Language Key)... 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. .