```json { "table_name": "column_classifications", "primary_key": "id", "candidates": [ { "rank": 0, "partition_key": "id", "partition_key_label": "primary_identifier", "partition_key_reasoning": "id is the unique identifier with RPUV=1.00, uniqueness=1.000, and 8,829 distinct values across 8,829 rows. Each row represents a single classification assignment of a column to a label (TOPOLOGY, MEASURE, COORDINATE) within a classification candidate run.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables typically do not require internal sorting. No temporal or sequential ordering is needed.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table mapping column classifications. The id column uniquely identifies each classification record. classification_candidate_id (RPUV=14.96) groups classifications by run but is not suitable as partition key for a dimension table. columns_catalog_id (RPUV=1.19) references the column being classified. The table serves as a reference for column label assignments (TOPOLOGY, MEASURE, COORDINATE) across different classification runs." } ] } ```