Beginning Drupal 8

Chapter 4 ■ Taxonomy
If you happen to forget to select a parent term before saving, you can always position a term by
clicking the arrows icon, holding the button down and dragging it to the position in the hierarchy where it
should reside. You may also assign the term to the appropriate parent term by clicking the Edit button and
modifying the value in the Relations section.
We now have the ability to assign taxonomy terms to content items at the child level as well as at the
parent level.
The resulting web page that is created using this method now shows the associated sport as “High
School.” Clicking High School would render a list of all pages that are associated with the term “High School.”
Using views, which are described in detail in Chapter 5, provides you with the additional capability of listing
all content within the hierarchy—for example, all articles categorized as Basketball, regardless of whether
they pertain to high school, college, or NBA.
Assigning More Than One Vocabulary
There may come a time when categorizing content by a single vocabulary represents a constraint that you
must overcome to address a complex requirement for content categorization. Fortunately, Drupal does
not constrain you as to how many vocabularies you can assign to a content type. Simply follow the steps
you performed earlier in this chapter to add a second field to the content type. Simply select a different
vocabulary as the source for the values that you wish to present to the author.
Summary
This chapter introduced the power and simplicity of taxonomy. I suggest that you start using taxonomy
on your first site, because the more you use it, the more comfortable you will be with its capabilities and
the power that it brings to the content you deliver to your visitors. I will continue to leverage taxonomy
throughout the rest of this book as I cover other advanced Drupal features.
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