4. The method of claim 3 , wherein the XML index contains a row for each node in a set of XML documents, and wherein said row contains the value of the node.
4. The method of claim 3 , wherein the XML index contains a row for each node in a set of XML documents, and wherein said row contains the value of the node. 5. The method of claim 4 , wherein performing said XML rewrite of said certain query includes rewriting the query to refer to a database object of the XML index.