CKI_UMB_ML 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 "Value for pstngs to prev. per. that cnnt be act.(no pr.dif.)" 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_CKI_UMB_ML TYPE CKI_UMB_ML.
The CKI_UMB_ML table consists of various fields, each holding specific information or linking keys about Value for pstngs to prev. per. that cnnt be act.(no pr.dif.) data available in SAP. These include PRDIF_2 (Value of postings to previous per. that cannot be activated), PRDIF_3 (Value of postings to previous per. that cannot be activated)... 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. .