This page will attempt to assist you in building a Web URL Category review process, as well as provide best practice recommendations from BlueCoat and my own personal experience with BlueCoat.
BlueCoat does not update their Web URL Categories very often, but it does happen about once every 12-18 months. In earlier times, they were not very helpful about this and normally only included a single email to subscribed users (a very manual process – it is not created for you when you purchase a BlueCoat device and license), and they would upload the Web URL Category pdf file on their website. In the last couple years, they have provided a bit more detail when they update. Not only will they send out an email, but they will post a note for it on their BTO website, as well as provide some FAQ/KB-type Q&A for us techies to decide how to handle the update (when they split or combine categories). The last update of the Web URL Categories was September 2013 and they provided some very good info this time. Kudos to BlueCoat.