Added IANA considerations. Removed extraneous notes. Made clear that examples are not registrations. Mention the standalone declaration. Removed normative references to XML Base, XLink, and XPointer, since they are still working drafts.
Fragment identifiers are still undefined.
Mechanisms for embedding the base URI are still undefined. Internet-Draft, November 8, 1999. Non-XPointer fragment identifiers for XML vocabularies like SVG and SMIL requires further discussion. This document also proposes a convention for naming media subtypes outside of these three subtypes when those subtypes represent XML entities. An IETF Internet Draft from the Network Working Group was published recently on the topic of XML Media Types .