Integration for Discount Rate Index?

Summary: If I use the Rapid Implementation spreadsheet for loading Discount Rate Indexes, it produces an xml file to be loaded. IN what format, by what process can I load this data via csv or similar, so that the regular import of new rates can be automated/ made into a repeatable process to produce that doesn't rely on downloading the rapid implementation spreadsheet...?

Content (required): Initial load created by Rapid Implementation spreadsheet load, but this is not fit for purpose for ongoing uploads.

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