There are several standards developing organizations working on clinical data models, technical reports, guidelines and standards for clinical data. Some of these SDOs include HL7, ADA, X12, IEEE, ACR/NEMA/DICOM, and ASTM. Information regarding some of the standards being developed by HL7 and ADA appeared in the previous claims and encounter section and detailed information regarding their other projects appears in the Appendix explaining the activities to promote interoperability of standards - frameworks, architectures and models. Additional information regarding ASTM appears in the Security section. Claim attachment information pertaining to X12, IEEE, DICOM, and ASTM standards is listed below.