read the SVD from the supplied path.
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      read from binary
      
    
      read the column term map from CSV.
      
    
      read the document index map
      
    
      read from the zip archive.
      
    
      
      
    
      
      
    
      
      
    
      
      
    
      
a reader trait for the latent semantic index.