While this guide provides a good starting point to understand the DEAPI, you will need to reference additional documentation while developing your code. We are in the process of generating web-based documentation of DEAPI endpoints, but in the meantime you can reference the Data Exporter API Objects PDF document, which is also available in the DataExporter and Reporting API community within the Cornerstone Success Center (CSC). As you develop code and/or ETL to consume CSOD's DEAPI, you will need to refer to this documentation for schema details and data dictionary. You can also post questions to the group in the CSC community and receive updates on patches and releases. Documentation (including at the link above) will be updated by the start of UAT of every release.