This is a library dependency for compass that provides a css validator for compass projects. It is only useful during development and should be installed separately. Very little is original code. Java is required and must be on the $PATH.
The W3C Validator can be challenging to install and get working. The Compass Validator makes it much easier. On a system with java installed all you have do is this:
$ gem install compass-validator
$ compass-validate <css_folder>
In your compass project all you have to do is:
$ compass validate
== Copyright
Copyright (c) 2009 Chris Eppstein. See LICENSE for details. Additional copyrights for included software can be found in lib/java_validator.