1. A system for validating a mapping of data between a raw data source and a raw data target, comprising: means for generating respective data signatures of the raw data source and the raw data target; means for sampling the raw data source and the raw data target to obtain respective data samples; means for processing the data samples and data signatures to determine the status of the validation process; and means for combining a result of the sample comparison with a result of signature comparison in a logical manner based upon the determined status.