<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>The NCI Common Scientific Outline (CSO) is a classification system organized around seven broad areas of scientific interest in cancer research to lay the framework for better coordination among research organizations and funding agencies: cancer biology; cancer etiology; cancer prevention; cancer early detection, diagnosis, and prognosis; cancer treatment; cancer control, survivorship, and outcomes research; and scientific model systems. The NCI research portfolio is organized around the CSO categories.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>