joomla/joomla-platform — pull request #1675 by LouisLandry (2012-11-09 23:56:19+00:00)
Title: Add deprecation tags to legacy classes.

Most of these have been marked for removal at 13.3. This is roughly a year of having them stick around in the legacy tree. My suspicion is that most -- if not all -- of these classes will end up being picked up and maintained by the CMS project for much longer than Q3 of 2013.