This document standardizes five new media types -- text/xml, application/xml,
text/xml-external-parsed-entity, application/xml- external-parsed-entity, and
application/xml-dtd -- for use in exchanging network entities that are related to the
Extensible Markup Language (XML). This document also standardizes a convention (using the
suffix '+xml') for naming media types outside of these five types when those media types
represent XML MIME entities. For example, SVG has media-type image/svg+xml, and XHTML has application/xhtml+xml.