A major shift in the style of enterprise data management is under way, and there are huge architectural issues yet to be resolved. Oracle, not surprisingly, wants you to store everything in a centralized hybrid DBMS. IBM says it would rather enable you to federate data across a range of sources. Each strategy has merit, and most enterprises will wind up pursuing both — in different ways, for various reasons. Despite these differences, we are witnessing a sacred union. SQL and XML have been pronounced man and wife, and the honeymoon has begun. [Full story at InfoWorld.com]