ARCH_DEF is a standard SAP Table which is used to store Definition of archive object data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The ARCH_DEF table consists of various fields, each holding specific information or linking keys about Definition of archive object data available in SAP. These include SEQUENCE (Number of the record in the archive hierarchy), FATHER (Parent segment in archive hierarchy), SON (Segment in the Archive Hierarchy), STRUCTURE (Structure of segment in archive hierarchy)... 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. .