These drafts are outdated.
Please see the recent work of IHE-RO XRTS, CodeX RTTD, mCODE. Repo at https://github.com/HL7/codex-radiation-therapy
Published to a temporary location here
http://build.fhir.org/ig/HL7/codex-radiation-therapy/branches/master/index.html
For questions and comments, please contact Martin von Siebenthal.