We have either wrong "Deployment Rule Set" documentation link in 7u40 release notes or the DRS documentation is not staged.

See http://www-content.oracle.com/technetwork/java/javase/7u40-relnotes-2004172.html?SSContributor=true#jfx-rn

The "New features and Changes" section contains "Deployment Rule set" notes with the reference to
http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/deployment_rules.html

The latter doesn't exists.