Closing https://github.com/uncefact/vocab/pull/79 without merged

https://github.com/uncefact/vocab/pull/80 - closed

https://github.com/uncefact/vocab/pull/81 - merged

https://github.com/uncefact/vocab/pull/82 - pending, did't produce expected output

Discussion on https://github.com/uncefact/vocab/issues/72
David to submit all semantic feedback and close tickets