In some aspects, an interface is provided that has options for defining entities and attributes. A model of a remote data source is defined based on inputs received via the interface. The model includes an entity representing a data segment from the remote data source. The entity has properties, which represent fields of a data structure in the remote data source and have data type descriptors indicating data types used by the fields. The model also includes an attribute specifying a function, which uses the properties as inputs. The entity is matched to exported data from the remote data source. The match is performed based on the exported data elements being arranged in a hierarchy corresponding to the properties and the data elements having the data types corresponding to the data type descriptors. The attribute's function is executed using, as input data, the data elements mapped to the properties.