For a table projection in a knowledge store (skillset definition), the table node must define: tableName : the table to project into (physical expression). generatedKeyName : the name of the system-generated key column. source : an object-shaping expression (projection path) describing what document content flows into the table. dataSource/dataSourceConnection are service-level objects used by the indexer, not properties of a table projection node. References Knowledge store and projections schema: table projections require tableName, generatedKeyName, and source in the skillset JSON.