In this paper, I investigate the problem of providing guarantees for heterogeneous system integration. I propose a set of strong properties, FACD, which when held in the integration transaction will deliver correct results. The strong properties support an integration technique called CCETL(Continuous, Consistent, Extract, Translate, and Load). CCETL consumes UML class diagrams to identify transactional membership of the data elements that make up the integration. CCETL transforms the hierarchical relationships using a version of the topological sort. The sort maintains a navigation path from the original UML classes. The CCETL approach guarantees ACID properties up to the level of snapshot isolation between systems supporting a continuous integration.