URN Namespaces for XML Namespaces and RDF IRIs

XML segregates elements into namespaces, which can be used to mix tags with different semantics in a composite XML document. XML namespaces are identified by URIs (XML 1.0) or IRIs (XML 1.1). Similarly, RDF contains "nodes" that are identified by "URI references" (RDF 1.0) or "IRIs" (RDF 1.1). This document defines URNs specifically for XML namespaces and RDF nodes.