This document defines and describes the HCM Data Loader tool, which is Oracle's next generation tool for loading legacy HCM data into Fusion Applications. It recommends that new customers use HCM Data Loader by default, while existing customers using the older File-Based Loader should plan a migration. The key steps for migrating include converting File-Based Loader GUIDs to HCM Data Loader source keys, testing the new integration processes, and switching the loading scope to use HCM Data Loader fully instead of File-Based Loader.