DD09L is a standard SAP Table which is used to store DD: Technical settings of tables data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The DD09L table consists of various fields, each holding specific information or linking keys about DD: Technical settings of tables data available in SAP. These include AS4LOCAL (Activation Status of a Repository Object), AS4VERS (Version of the entry (not used)), TABKAT (Size category), TABART (Data class in technical settings)... 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. .