Embodiments of the present invention address deficiencies of the art in respect to deploying XForms in an enterprise environment and provide a method, system and computer program product for forms integration of an external data model not implemented through a DOM accessible API. In one embodiment of the invention, a method for forms integration of an external data model not implemented through a DOM accessible API can include generating a data graph for an external data model for a forms based application and transforming the data graph into a DOM representation of the data graph. Value changes for fields of a form in the forms based application can be applied to nodes of the DOM representation and mutations in the nodes of the DOM representation can be synchronized to corresponding nodes in the data graph.