Health Level Seven
Health Level Seven International has put together free Webinars to learn about HL7. Health Level Seven International (HL7) is the global authority on standards for interoperability of health information technology with members in over 55 countries (HL7). HL7 Webinars HL7 Wiki
For editing purposes you can either pay for 7edit (evaluation version is 21 days) or you can use an open source editor such as QuickViewHL7 or HL7 Inspector.