Add link to Kristina S's slides on Taxonomies
@@ -37,6 +37,8 @@ Not all content types in your Drupal site need be Islandora "resource nodes". A
## Vocabularies
+See also: [MIG Presentation on Taxonomies](https://docs.google.com/presentation/d/1LfpU6H4qxXtnYQPFntwMNtsgtU30yzp2MxwKKAllUOc/edit?usp=sharing) by Kristina Spurgin, 2021-07-19
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In Drupal, _Taxonomy Vocabularies_ (or simply _Vocabularies_) are also entity sub-types that define a set of fields and their configurations. Whereas instances of content types are called _nodes_, items in a vocabulary are called _taxonomy terms_ (or simply _terms_). Traditionally, taxonomy terms are used to classify content in Drupal. For instance, the Article content type includes a field `field_tags` that can refer to terms in the Tags vocabulary.
There are two ways that users can interact with taxonomies: they can be "closed," e.g. a fixed list to pick from in a dropdown, or "open," e.g. `field_tags` where users can enter new terms, which are created on the fly. This is not set on the _vocabulary_ itself, but in the configuration of the field (typically on a node). Terms within vocabularies have an ordering, and can have hierarchical structure, but do not need to.
