A framework for declarative expression of data processing is provided. The framework allows for data to be represented by its metadata in a declarative manner, allowing for the generation of code at, for example, build time. The declarative representation of the metadata facilitates the separation of the data (e.g., the raw data that is stored in a data store and that is available using, for example, a data store adapter) from the code (e.g., the code that is executed for the manipulation and validation of data) and the view (e.g., the form that the data is shown to a user, for example, through a UI).