What is “rnv” Package?

Implementation of Relax NG Compact Syntax validator
For more details: http://freshmeat.net/projects/rnv

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install rnv.

  brew install rnv

Now, use rnv!