semi-structured data note

Author: aahill

articles/ai-services/openai/concepts/use-your-data.md

@@ -82,6 +82,8 @@ For some data sources such as uploading files from your local machine (preview)
 |URL/Web address (preview)        | Web content from the URLs is stored in Azure Blob Storage.         |
 |Azure Blob Storage (preview) | Upload files from Azure Blob Storage to be ingested into an Azure AI Search index.         |
 
+If you choose to upload files or use Azure Blob Storage, your data should be unstructured text for best results. If you have non-textual semi-structured or structured data consider converting it to text. If your files have special formatting, such as tables and columns, or bullet points, prepare your data with the data preparation script available on [GitHub](https://github.com/microsoft/sample-app-aoai-chatGPT/tree/main/scripts#optional-crack-pdfs-to-text).
+
 :::image type="content" source="../media/use-your-data/azure-databases-and-ai-search.png" lightbox="../media/use-your-data/azure-databases-and-ai-search.png" alt-text="Diagram of vector indexing services.":::
 
 # [Azure AI Search](#tab/ai-search)