17. The least one computer readable storage medium as recited in claim 15 , wherein the trainee operator is a previously trained operator and execution of the trainer operator is accomplished by: copying a plurality of immutable properties and values from the trainee operator and associating the copied immutable properties and values with the trained operator; and after execution of a learning algorithm results in a set of final mutable properties based on the training data and the trainee operator, associating the final mutable properties with the trained operator, wherein the final mutable properties include one or more of the following: a rule set specifying how to classify information, a plurality of weights for correlating one or more information features of a document with a particular classification result, a model for extracting information from a document, or thresholds for the number of features to consider.
17. The least one computer readable storage medium as recited in claim 15 , wherein the trainee operator is a previously trained operator and execution of the trainer operator is accomplished by: copying a plurality of immutable properties and values from the trainee operator and associating the copied immutable properties and values with the trained operator; and after execution of a learning algorithm results in a set of final mutable properties based on the training data and the trainee operator, associating the final mutable properties with the trained operator, wherein the final mutable properties include one or more of the following: a rule set specifying how to classify information, a plurality of weights for correlating one or more information features of a document with a particular classification result, a model for extracting information from a document, or thresholds for the number of features to consider. 21. The least one computer readable storage medium as recited in claim 17 , wherein the values of the final mutable properties differ from a plurality of values of mutable properties as defined by the trainee operator.