XPath (2) is careful to distinguish between the type of a
node (the "node type") and the type of its value (its "type
annotation")
and indeed the "node kind", which is one of element, attribute, text,
comment, PI, namespace, or document.
Essentially, a "node type" may include constraints on the node kind, the
node name, and the node's [schema] type annotation.
Type annotation isn't quite the same as the type of the value. A node can
have a type annotation of xs:IDREFS, for example, and its value might be an
empty sequence. But there is a close relationship.
Michael Kay
http://www.saxonica.com/
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