The list returned by the getSelectList method for each SelectExp is an instance of the SelectList class. This list specifies properties that must be included in the selected instances, and consists of a list of AttributeExp instances. You can retrieve these AttributeExp instances using the elements method of SelectList. Each attribute denotes the name of a column that maps to a property of a CIMInstance in WQL. The AttributeExp has an apply method that, when passed in a CIMInstance, returns the value of the property that the AttributeExp represents. The SelectList has an apply method that, when passed in a CIMInstance, returns a CIMInstance containing only the properties that the SelectList AttributeExp instances denote.