Values a namespaced property.
The full name of a namespaced property consists of
a local part (
#getLocalName()) and a namespace (
#getNamespace()()).
This is similar - in concept - the local part and namespace of a QName
in XML.
Conventionally, the namespace
is an URI
and the name is simple, leading to a natural mapping into
RDF.
For example - namespace "http://james.apache.org/rfc2045",
name "Content-Transfer-Encoding", value "BASE64" mapping to
predicate "http://james.apache.org/rfc2045#Content-Transfer-Encoding",
object "BASE64".