ITOBFIELDS_INHERITANCE 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 "PM: ITOB fields relevant for inheritance" 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_ITOBFIELDS_INHERITANCE TYPE ITOBFIELDS_INHERITANCE.
The ITOBFIELDS_INHERITANCE table consists of various fields, each holding specific information or linking keys about PM: ITOB fields relevant for inheritance data available in SAP. These include IWERK (Maintenance Planning Plant), INGRP (Planner Group for Customer Service and Plant Maintenance), GEWRK (Object ID of the Work Center), ABCKZ (ABC indicator for technical object)... 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. .