Updates:
Status: Pending
Comment #1 on issue 819 by pekka.klarck: Drill down reports showing the
history of test results
http://code.google.com/p/robotframework/issues/detail?id=819
Historical reporting is not a feature we are planning to add to Robot core.
There are, however, tools that allow creating historical reports based on
the outputs. Have you looked the following options?
Plugin for Jenkins CI system (also Hudson plugin is available)
https://wiki.jenkins-ci.org/display/JENKINS/Robot+Framework+Plugin
risto.py -- historical reporting tool
http://code.google.com/p/robotframework/wiki/HistoricalReportingTool
