There are often cases where we need to perform operations based on multiple XML instances. To illustrate this, consider the example XML given below. Basically, we have two XML instances. The first instance (call this the results instance ) contains information...

XQuery uses the concept of a namespace, adopted from the XML 1.0 specification. But, due to the complex nature of the XQuery language and it's dual roles as both query and serialization/XML construction language, there are several nuances to the use of...