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If I understand correctly are you referring: Azure Blob data with blob index tags (preview) If am wrong please correct me
As datasets get larger, finding a specific object in a sea of data can be difficult. Blob index tags provide data management and discovery capabilities by using key-value index tag attributes. You can categorize and find objects within a single container or across all containers in your storage account. As data requirements change, objects can be dynamically categorized by updating their index tags. Objects can remain in-place with their current container organization.
For more information: Refer to this article
Use blob index tags (preview) to manage and find data on Azure Blob Storage
Additional information: Index large datasets
Hope this helps!
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