KOMPAXM 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 "Pricing: Cost Split in SD Document; Character Field" 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_KOMPAXM TYPE KOMPAXM.
The KOMPAXM table consists of various fields, each holding specific information or linking keys about Pricing: Cost Split in SD Document; Character Field data available in SAP. These include KMEIN (Condition unit), CEPOK (Status expected price), MPROK (Status manual price change), KOUPD (Condition update)... 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. .