This would typically happen in parallel, as each node receives and performs the query on its locally cached state. And returns results.
The picture above is Kazunori making a disc-stamping motion with his hands as he answered our query on the ever-shifting release date.
Uniformly means that you can meaningfully run the same query on all data sources.
Once we have the correct XPath statement, we can embed it into an XQuery that indicates which table column we want to run the XPath query on.
The UNION statement in particular is useful to a hacker because it allows him to splice the results of one query onto another.
In this case, it may be a good option to store those results locally instead of calling the query on every request.
