Morningstar Fundamentals Documentation has disapeeared

The Morningstar Fundamental Data is indeed documented and available. The US Fundamental Data by Morningstar tracks US Equity fundamentals, covering 5,000 US Equities, starting from January 1998, and is delivered on a daily frequency. This dataset includes financial statements and valuation ratios. The data is available for multiple periods depending on the property, including 1 mo, 2 mo, 3 mo, 6 mo, 9 mo, 12 mo, 1 Yr, 2 Yr, 3 Yr, and 5 Yr periods source.

To get fundamental data into your algorithm, you can add a fundamental universe and access the FineFundamental properties in your fine universe selection function or access the Fundamentals property of the Equity objects in your fundamental universe. Here is a Python code example:

fundamentals = self.Securities[self.symbol].Fundamentals

You can filter FineFundamental objects using the MorningstarSectorCode, MorningstarIndustryGroupCode, and MorningstarIndustryCode enumeration values source.

If you are looking for specific data points, you can refer to the Data Point Attributes section of the documentation.

I still think there might be a problem. 

Please point me to where the fundamental data attributes, e.g. FinancialStatements, ValuationRatios, OperationRatios are documented. They seem to have disappeared from the documentation. 

For example, to be able to change the following:

history = qb.GetFundamental(symbol, "ValuationRatios.PERatios", datetime(2021, 1, 1), datetime(2021, 7, 1))

into getting the Price/Book Ratios, how do I find the exact attribute for Price/Book?

I apologize for the confusion, but the specific documentation for each attribute like FinancialStatements, ValuationRatios, OperationRatios is not provided in the extracts given. However, you can refer to the QuantConnect Documentation for more details.

As for your example, to get the Price/Book ratio, you would need to know the exact attribute name used in QuantConnect's data library. Unfortunately, the exact attribute name for Price/Book ratio is not provided in the given extracts.

Here is a general example of how you would use the GetFundamental method:

history = qb.GetFundamental(symbol, "attribute_name", datetime(2021, 1, 1), datetime(2021, 7, 1))

You would replace "attribute_name" with the exact attribute name for the Price/Book ratio.

Please refer to the QuantConnect Data Library for the complete list of available data.

This seems to be in the process of being updated. I have been trying to get it figured out all weekend but as far as I can tell the new fundamental methods are not working and the old documentation has been removed. 

they actually made GetFundamental which was not available before! that is new, very exciting, they should have like announced that or something