A UML Profile Diagram is a powerful tool for customizing standard UML models to fit specific domains, from IT management and enterprise software to mobile applications and service-oriented architectures. By using UML profiles, teams can define domain-specific stereotypes, tagged values, and constraints, all while keeping their models compatible with standard UML tools. In this guide, we’ll break down the key elements of a UML profile diagram, show you how to create one step-by-step, and explore ready-to-use templates to accelerate your modeling workflow.