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Why is metadata pre-filtering inside the vector database considered mandatory for secure multi-tenant or jurisdiction-sensitive RAG deployments?

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intermediate 45 min

Day 7: Design Metadata for Filtering and Provenance

Design Metadata for Filtering and Provenance

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In the FieldDesk database query above, why are equipment_model, revision, and lifecycle_state applied as hard SQL WHERE predicates rather than relying on vector similarity alone?

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In PolicyDesk, several ingestion scripts recorded country metadata as free-form strings: some wrote 'Germany', others 'DE', 'de', or 'Federal Republic of Germany'. When an employee in Berlin queries policies using a pre-filter for jurisdiction == 'DE', 65 percent of valid German policies are missed. What engineering control must be added to the ingestion pipeline to permanently resolve this?

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