This blog post explains how to use Obeo UMLDesigner to create your first UML model with a custom UML profile. UML Designer is an open source Eclipse plugin for the Unified Modeling Language. It provides a set of common diagrams to work with UML 2.1 models. The intent is to provide an easy way to make the transition from UML to domain specific modelling. This way users can continue to manipulate legacy UML models and start working with DSL.