1. A system for performing an integration of an origin data set into a target data set, the system comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the system to: receive the origin data set, the origin data set being organized by an origin data set schema specifying a tabular format for data of the origin data set; receive a target data set ontology, the target data set ontology defining data objects of the target data set; generate, according to the origin data set schema and the target data set ontology, a domain-specific transform programming language specific to the origin data set schema and the target data set ontology; receive transform instructions programmed in the domain-specific transform programming language; generate a preview target data set from at least a portion of the origin data set using the transform instructions, the preview target data set generated in response to receiving the transform instructions; and integrate the at least a portion of the origin data set into the target data set according to the received transform instructions in response to the preview target data set corresponding to the target data set ontology.