URL Category Set Updates and Reports

The set of predefined URL categories may periodically be updated on your Security Management appliance, as described in Preparing For and Managing URL Category Set Updates.

When these updates occur, data for old categories will continue to appear in reports and web tracking results until the data is too old to be included. Report data generated after a category set update will use the new categories, so you may see both old and new categories in the same report.

If there is overlap between the contents of old and new categories, you may need to examine report results more carefully to obtain valid statistics. For example, if the “Instant Messaging” and “Web-based Chat” categories have been merged into a single “Chat and Instant Messaging” category during the time frame that you are looking at, visits before the merge to sites covered by the “Instant Messaging” and “Web-based Chat” categories are not counted in the total for “Chat and Instant Messaging”. Likewise, visits to instant messaging or Web-based chat sites after the merge would not be included in the totals for the “Instant Messaging” or “Web-based Chat” categories.