When a new document is uploaded to S3, EventBridge receives an S3 Object Created event. An Event rule is configured to match the S3 Object Created and trigger a Lambda function. The Lambda function downloads the document, extracts content of each page in the document. The Lambda function code then iterates through the pages, invokes Amazon Titan Embeddings model to create embeddings for each page. The embeddings along with the page content are then stored in a vector index in a OpenSearch Serverless collection.