NonKeyAttributes | 
            
            
            
                
String
            
             | 
            
            
            Required: No. The non-key attribute names that are projected into the index.For local secondary indexes, the total count of NonKeyAttributes                   summed across all of the local secondary indexes must not exceed 20. If you                   project the same attribute into two different indexes, this counts as two distinct                   attributes in determining the total. | 
        
    
        
            
                ProjectionType | 
            
            
            
                
String
            
             | 
            
            
            Required: No. The set of attributes that are projected into the index:Only the index and primary keys are projected into the                               index.Only the specified table attributes are projected into the index.                               The list of projected attributes are in                               NonKeyAttributes.All of the table attributes are projected into the index. | 
        
    
        
            
                KEYS_ONLY | 
            
            
            
                
undefined
            
             | 
            
            
            Required: undefined. Only the index and primary keys are projected into the                               index. | 
        
    
        
            
                INCLUDE | 
            
            
            
                
undefined
            
             | 
            
            
            Required: undefined. Only the specified table attributes are projected into the index.                               The list of projected attributes are in                               NonKeyAttributes. | 
        
    
        
            
                ALL | 
            
            
            
                
undefined
            
             | 
            
            
            Required: undefined. All of the table attributes are projected into the index. |