A named item. Named items have two names; their schema-local name (a string)
and a QName qualified by their schema's target namespace. Note that the qualified
name is not the on-the-wire name for attributes and elements. Those
names depend on the form, and are managed by XmlSchemaNamedWithForm.
Get the QName for this object. This is always the formal name that identifies this
item in the schema. If the item has a form (an element or attribute), and the form
is 'unqualified', this is not the appropriate QName in an instance
document. For those items, the getWiredName method returns the appropriate
QName for an instance document.