Working with Taxonomy

Abstract

Taxonomy is the classification of things. Drupal comes with a taxonomy module that allows you to classify nodes (which are, essentially, “things”). In this chapter, you’ll look at the different kinds of taxonomies Drupal supports. You’ll also see how the data is stored, and how to write queries against the taxonomy database tables for incorporation into your own modules. Finally, you’ll see how your modules can be notified of changes to taxonomies, and we’ll go over some common taxonomy-related tasks.