What is a MetaFrame?

A MetaData DataFrame (MetaFrame) is:

1. A DataFrame
2. Without MultiIndex index
3. Without MultiIndex columns
4. With a numeric index

MetaFrameRow (MFR) - MetaFrameCol (MFC)

A MetaFrameRow (or MFR) is a DataFrame view of a pandas DataFrame index (pd.Index or pd.MultiIndex).

A MetaFrameCol (or MFC) is a DataFrame view of a pandas DataFrame columns (pd.Index or pd.MultiIndex).

Both the MFR and MFC are linked with their DataFrame: affecting MetaFrames affects the DataFrame.