Metadata frameworks

Store metadata alongside chunks/embeddings.

Examples:

• document ID
• author
• department
• creation date
• update date
• product
• region
• access classification
• document type

Metadata improves:

• filtering
• relevance
• access control
• freshness
• context awareness

{
  "document_id": "policy-123",
  "department": "finance",
  "region": "us",
  "updated_at": "2026-08-01",
  "classification": "internal"
}

• Amazon S3 metadata/tags
• OpenSearch metadata
• DynamoDB
• Bedrock Knowledge Bases metadata/filtering patterns

Semantic similarity alone may return a semantically similar but unauthorized or outdated document.

Metadata filters can address those dimensions.

---