On of the key benefits of a delta table format is that it's open.  Is this also the case for vector indexes as well? If so where could I find it's specification?

In Databricks today, we see that we can create and manage a vector index using API's. (https://docs.databricks.com/api/azure/workspace/vectorsearchindexes/createindex). Is this also possible using spark data frame operations as well?

thanks

Krishna