The final version of the SWORD V3 specification has been released with no major changes from the Release Candidate. As expected, some details did need tightening up/clarification as a result of the Invenio implementation exercise last year. Links to the specification, code and other supporting documentation can all be found by clicking on the SWORD V3 (top right of the page).
If you are interested in developing SWORD V3 support for your preferred programming language/platform, please let us know at sword@cottagelabs.com.