#133 - correct uri attribute name in <link> element
#137 - correct <shortDescription> location
#138 - better handling of xml:lang attributes
Many of the existing language attributes have been removed, as they served no current useful purpose. The ones that remain are the document and service provider (driven from the service provide default language) and the service (driven from the service).
The power of this attribute will come when the inheritence of the language is more properly defined (i.e. that service will inherit from service provider if not defined, service provider will inherit from document if not defined), and elements are able to override this (e.g. additional names and descriptions in languages other than the declared language).