1. A method, comprising: identifying a plurality of entities having relationships therebetween, the plurality of entities comprising at least one of a graphical model, generated code, a generated report, a requirements document or an intermediate representation; accessing a first entity from the plurality of entities; accessing a second entity from the plurality of entities; and mapping the first entity to the second entity, where mapping the first entity to the second entity includes bi-directionally mapping a first part of the first entity to a second part of the second entity.