The documentation is for Jetty is a constant work in progress.
This documentation is a community effort and is hosted at GitHub and we invite contributors to fork the repository and contribute! More information can be found in the Contributing Documentation section.
You can also download PDF versions of the documentation from Webtide at http://www.webtide.com. Updated PDF's will be available as we release new Jetty versions and once registered are located under the Downloads section of the website.
Documentation for specific versions of Jetty 9 are available here. Generally speaking the current documentation is best however we provide these snapshots of the documentation at specific release points for reference.