In an approach for semantically translating data. Aspects of an embodiment of the present invention include an approach for semantically translating data, wherein the approach includes a processor selecting a first node. A processor identifies a parent node of the first node. A processor determines that a value of the first node is unknown. A processor responsive to determining that the value of the first node is unknown, annotates the first node to indicate that the first node is at least partially unknown. A processor identifies a common table expression of the first node. A processor determines that the common table expression of the first node matches, within a predetermined threshold, a common table expression of the second node. A processor merges information from the common table expression of the second node with the common table expression of the first node.