The i* framework proposes a goal-oriented analysis method for requirements engineering. It is a systematic approach to discover and structure requirements at organizational level where functional, non-functional requirements and their relations are specified. A Domain Specific Language (DSL) has the purpose to specify and model concepts in some domain, having several advantages in relation to general purpose languages, such as it allows expressing a solution in the desired language and at the desired abstraction level. In order to create such a DSL, normally it is necessary to start by specifying its syntax by means of a metamodel to be given as input to the language workbenches that generate the corresponding editors for it. With a proper editor for the language we can specify models with the proposed notation. This paper presents a DSL for the i* framework, with the purpose to handle complexity and scalability of its concrete models by introducing some innovations in the i* framework metamodel like mechanisms that will help to manage the models scalability.