Projection Chaining
Chain projections to create multi-layer data architectures like medallion (bronze/silver/gold), data vault, and star schema patterns.
Multi-Layer Data Architectures
Real data architectures rarely have a single transformation step. Data flows from source systems through landing zones, cleansing layers, conformed dimensions, and analytics-ready structures. Projection chaining models this by letting one projection source its entities from another projection rather than from the canonical model. Each link in the chain is an explicit, reviewable transformation.
Common Multi-Layer Patterns
Projection chaining supports several well-established data architecture patterns. Each pattern uses the same chaining mechanism but with different structural conventions.
Lineage Across Layers
Lineage is preserved through the entire chain. You can trace a field from its canonical definition in the model through every transformation layer to its final form in the analytics-ready projection. When a field changes at any layer, the impact is visible downstream. This makes it possible to answer questions like "which gold-layer columns are affected if we rename this source field" without manual investigation.