The key() function can also be used with a(n) _____ to select a specific node from a node set.
A) ID
B) index
C) predicate
D) DTD

Question

Quizplus · Accepted Answer

The key() function is used to look up a value in an XML document and return the corresponding nodes. It can be used in combination with a predicate to select a specific node from the node set. The predicate can be based on any attribute or element value. Using an ID would be redundant since IDs are already unique and can be used as a standalone selector. An index would not be specific enough to select a specific node, as the index would vary depending on the context of the node set. A DTD is not used to select nodes in XML documents, but rather to define the structure and rules of the document.

The Key() Function Can Also Be Used with A(n) _____