Taxonomy Access Control "Lite"

The tac_lite.module belongs to a family a Drupal add-ons called "node access modules". These modules allow some users to view a piece of content, while hiding the content entirely from others. I say "view", but these modules also control updating and deleting.

In the case of TAC Lite, the factor that determines access is how a node is tagged. (In Drupal, the word for tags is "taxonomy".)

Despite the "Lite" in the name, this module is quite advanced. Administrators can grant view, update or delete permissions based on tags, granted to either individual users or all users of a particular role. It can also hide the existence of tags, just like it hides the nodes from users without sufficient permission. The "Lite" refers to the small footprint of the module. It adds no new database tables (because Drupal core provides enough).