Upstream Lineage: Sources Trace the origins of data - answer "Where does this data come from?" Lineage Investigation Step 1: Identify the Target Type Determine what we're tracing: - Table : Trace what populates this table - Column : Trace where this specific column comes from - DAG : Trace what data sources this DAG reads from Step 2: Find the Producing DAG Tables are typically populated by Airflow DAGs. Find the connection: 1. Search DAGs by name : Use and look for DAG names matching the table name - - table - - table 2. Explore DAG source code : Use to read the DAG definition - Look for INS…