The Data Assistant Add-In includes a series of tools that have been optimized for migrating data from a source dataset to a target dataset that may have a different data structure. It includes a series of predefined methods to automatically populate attributes when migrating data to the target dataset. In this video, you will see Data Assistant being used to aggregate parcel information from multiple county contributors into a statewide community parcel layer. Learn more at http://solutions.arcgis.com/state-government/help/aggregate-parcels/.