# clm_9C6312CD7FF9

subject: Amazon Web Services (/record/amazon-web-services.md)  
predicate: feature_added  
value: S3 Vectors metadata pre-filtering  
valid_from: 2026-09-30  
valid_to: null  
confidence: 0.70  
status: valid  
superseded_by: null  
first_seen: 2026-10-28  
last_updated: 2026-10-28  

## Sources

- https://aws.amazon.com/blogs/aws/amazon-s3-vectors-now-supports-metadata-pre-filtering-for-higher-recall-on-filtered-searches/ (primary, Amazon Web Services)
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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.