A method and apparatus for authoring model-to-model transformations of programming models involving profiles is disclosed. Using a declarative mapping between a given profile of a subject programming model and a target profile of a target programming model, transformation of the given profile is specified and results in a declarative specification. Similarly the declarative mapping may be to a profile of a target programming model (without a corresponding source side profile) or from a profile of a source programming model (without a corresponding target side profile). Based on the declarative specification, a transformation code implementation (e.g. a transformation API) is generated. The given profile is specified as an input domain or as an output domain along with a meta model of the subject programming model. The generated transformation code implementation effectively handles complexities of dealing with the given profile at run time.