# The namespace declaration URI as a constant.
	#
	# The value is `http://www.w3.org/xmlns/2000/`, as defined
	# in a erratum to the “Namespaces in XML” recommendation.
	#
	# This is the Namespace URI that is automatically mapped
	# to the `xmlns` prefix.
	var nsdecl = "http://www.w3.org/xmlns/2000/"