Context
Review modules that can help enhance taxonomy hierarchy management.
Discovery
Enhanced Taxonomy Manager
Provides new UI for managing taxonomy.
Can add children to selected terms, but not on the top level items.
New module, 42 users.
Taxonomy Manager
Provides additional taxonomy UI.
Bulk term input.
Issue: Missing functionality to move terms (change weight)
12,646 users on 2.x.
Hierarchy Manager
Use jsTree for managing hierarchies.
Drag and drop to move items.
Issue: Add child term
415 users.
Taxonomy Entity
Overrides taxonomy classes to set allowed hierarchy settings.
No hierarchy, single parent, multiple parent.
Issue: Incorrect file name
Issue: Unable to select second level parent [patch]
3 users.
Taxonomy Parent Autocomplete
Issue: Autocomplete terms don't show depth
11 users.
Better Taxonomy Parent Selector
Use Simple Hierarchical Select on taxonomy parent reference field.
Dev module, not much traction.
Issue: Previous parent reference field still visible
Issue: Automated Drupal 11 compatibility fixes for better_taxonomy_relation
Entity Reference Tree Widget
Uses jsTree for selecting taxonomy terms in reference fields.
Issue: Support RELATIONS (Parent term) section of taxonomy term form
Taxonomy Term Reference Tree Widget
Taxonomy term reference widget with expanding tree.
Issue: Use widget for taxonomy term parent field
Taxonomy Widget Plus
Basic taxonomy reference widget. Good for short lists.
Option to scroll, but not expand/collapse items.
Issue: Field widget option "Add new"
Term Reference Fancytree
Uses fancytree library for taxonomy references. Dynamically loads children.
Search items. Select/deselect children.
Client-side Hierarchical Select
Taxonomy reference field.
Issue: Add functionality to add new terms
Issue: Client-side hierarchical select for selecting the parent on the taxonomy "Add term" form
Simple Hierarchical Select
Taxonomy reference field widget and exposed view filter.
Issue: Add functionality to add new terms
Tagify
Entity reference widget using tagify library.
Select or autocomplete widgets. Autocomplete can show parents with [term:parents] in label.
Issue: Improve hierarchical dropdown with a better appearance
Drupal Taxonomy
Issue: Parent term relations select list as Hierarchical select list
Issue: Update taxonomy term base fields (parent and weight) to be configurable on form display and detail page
Issue: Provide an option to make the Parent terms as multiselect true or false
Issue: Scaleable/themeable taxonomy selection widget
Issue: Setting a parent for a taxonomy term in the Relations dropdown does not scale - use autocomplete instead of multiselect
Issue: Expose configuration for Relation