In order to keep our queries synchronized with the data model, we developed a simple test mechanism based on a practice of incremental development and testing. When changes are made to the data, incremental testing provides an efficient way to test all the known queries that area impacted by the changes. Practically, this means critiquing the accuracy of the RDF representation, deciding whether it should be modeled differ- ently, making changes (in our case, to the XSLTs which generate the RDF), and finally invoking the unit testing system to determine whether queries can still be answered. The advantages of this workflow are increased accountability, increased agility/confi- dence, and.
