UML-B provides a 'UML-like' graphical front end for Event-B. It adds support for class-oriented and state machine modelling but also provides visualisation of existing Event-B modelling concepts. UML-B is similar to UML but is a new notation with its own meta-model. UML-B provides tool support, including drawing tools and a translator to generate Event-B models. The tools are closely integrated with the Event-B tools so that when a drawing is saved the translator automatically generates the corresponding Event-B model. The Event-B verification tools (syntax checker and prover) then run automatically providing an immediate display of problems which are indicated on the relevant UML-B diagram element.
To start using UML-B, first enter the UML-B 'perspective' using the normal eclipse features (e.g. Window - open perspective - other). You should see a dolphin icon in the top right corner when you are in the UML-B perspective. Create a new UML-B project using the UML-B new project wizard (e.g. File - New - Project - UML-B Project). This will create a new UML-B Project and open a Package Diagram with an empty canvas ready for you to start drawing Machines and Contexts.