SWD_HEADER is a standard SAP Table which is used to store WF Definition/Runtime: Basic Data data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The SWD_HEADER table consists of various fields, each holding specific information or linking keys about WF Definition/Runtime: Basic Data data available in SAP. These include WFD_ID (Number of workflow definition), VERSION (Version), EXETYP (Workflow Type), STATUS (Workflow definition: Status)... 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. .