Knowledge Analytics is a subcontractor on the HCIS team that was awarded the CMS Measure Authoring Tool (MAT) contract. We are serving as the Technical Liaison and Cyber Security SME between the MAT team and the Center for Clinical Standards and Quality (CCSQ) ISG team and the CMS Technical Review Board (TRB). The Measure Authoring Tool (MAT) is a web-based tool that allows measure developers to author electronic Clinical Quality Measures (eCQMs) using the Quality Data Model (QDM). The tool provides the capability to express complex measure logic and export measures in several formats, including a human-readable document that can be viewed in a web browser, the fundamental green eCQM XML syntax (SimpleXML), and an eCQM HQMF XML document for integration with EHRs. The data expressed in the tool by users serves as the input for the ‘transform' process which ultimately supports the defined export files.