Schema validation and conversion based on RELAX NG

Current version

jing-trang requires the following formula to be installed:
ant 1.10.1 Java build tool

Recent formula history

ilovezfs jing-trang: depend on ant instead of :ant
ilovezfs Use “squiggly” heredocs.
Alexander Holupirek jing-trang: allow higher versions of Java (#18179)
Viktor Szakats jing-trang: secure url(s)
David Eyk jing-trang V20151127 (new formula) (#12998)

Formula code at GitHub