A solution providing for the dynamic design, use, and modification of models using a declarative software application meta-model that provides for self-modification of a collection of the models is provided. The solution can enable continuous real-time testing, simulation, deployment, and modification of the collection of the models. A model in the collection of the models can represent an entity or a function and can be included in a set of related models. Additionally, a set of related models can include a plurality of sets of related models. The collection of the models can represent, for example, one or more software applications, processes, and/or the like.