jackrabbit
  what
    open source software
    Java Content Repository
    Apache Jackrabbit http://jackrabbit.apache.org
    Apache Jackrabbit Wiki http://wiki.apache.org/jackrabbit/frontpage
  today
    Java Specification Request 170 http://www.jcp.org/jsr/detail/170.jsp
  related
    project
      Apache Sling project http://incubator.apache.org/sling
        what 
          Content Repository for REST-based applications
      REST explained http://www.xfront.com/REST-Web-Services.html
  future
    Specification
      Java Specification Request 283 http://jcp.org/en/jsr/detail?id=283