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examples/tutorials/doc-search/metadata.md

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+## Document Search by Metadata
+<callout>PageIndex with metadata support is in closed beta. Fill out this form to request early access to this feature.</callout>
+
+For documents that can be easily distinguished by metadata, we recommend using metadata to search the documents.
+This method is ideal for the following document types:
+- Financial reports categorized by company and time period
+- Legal documents categorized by case type
+- Medical records categorized by patient or condition
+- And many others
+
+In such cases, you can search documents by leveraging their metadata. A popular method is to use "Query to SQL" for document retrieval.
+
+
+### Example Pipeline
+
+#### PageIndex Tree Generation
+Upload all documents into PageIndex to get their `doc_id`.
+
+#### Set up SQL tables
+
+Store documents along with their metadata and the PageIndex `doc_id` in a database table.
+
+#### Query to SQL
+
+Use an LLM to transform a user’s retrieval request into a SQL query to fetch relevant documents.
+
+#### Retrieve with PageIndex
+
+Use the PageIndex `doc_id` of the retrieved documents to perform further retrieval via the PageIndex retrieval API.
+
+## 💬 Help & Community
+Contact us if you need any advice on conducting document searches for your use case.
+
+- 🤝 [Join our Discord](https://discord.gg/VuXuf29EUj)  
+- 📨 [Leave us a message](https://ii2abc2jejf.typeform.com/to/meB40zV0)