A DESCRIPTION OF THE PROBLEM :
following packages are included in rt.jar, but are not mentioned inside API documentation

org.w3c.dom.css
org.w3c.dom.html
org.w3c.dom.ranges
org.w3c.dom.stylesheets
org.w3c.dom.traversal
org.w3c.dom.xpath

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
All the included API packages should be mentioned inside the API documentation
ACTUAL -
The packages are not mentioned at all.

URL OF FAULTY DOCUMENTATION :
http://docs.oracle.com/javase/8/docs/api/overview-summary.html