Skip to content
Clear categories and useful filters

Plan taxonomies, custom fields and filters

Turn real visitor questions into a small, consistent classification system without overwhelming publishers or searchers.

Updated 24 July 2026 3 min read
A product and development team collaborating around laptops and notes
Built by people WordPress-native foundations
Structure content for people and search

Create a classification only when visitors will use it

Free includes the standard Type, Mode, Tag and Price Range classifications and their normal archive and map filters. Pro adds a live visual builder for global custom fields, custom classifications and dynamic archive or map filters when a directory needs a more specialised data model.

Use classifications for reusable choices

Audience, Discipline, Region, Accreditation and Service Category work as shared choices. A telephone number, deadline or one-off note belongs in a listing field instead. If that field needs to become a dynamic archive or map filter, plan it with Pro’s visual builder.

Built-in model

Use the four core taxonomies before adding more

Type and Mode can contain parent and child terms, Tag is a flat list, and Price Range can be hierarchical. Their public labels adapt to the selected profile.

Standard archive and map filters already use these Free classifications. Reusing them keeps submissions, search and content maintenance simple. Add another classification only when none of the four core choices expresses the distinction visitors need.

Pro data model

Design custom fields and classifications as one system

Use Pro when the four standard classifications cannot express a visitor’s decision. Give every custom field or classification a stable key, plain-language label, suitable input type and a clear reason to appear in submission, listing or filter views.

Choose each field type deliberately and use the live preview to check the resulting form. A hierarchical classification works like categories with parent and child terms; a flat one works like tags.

Editorial governance

Create a small vocabulary and name an owner

Build the first term set centrally rather than asking every contributor to invent wording. Decide singular/plural style, capitalisation, geographic granularity and whether near-synonyms should merge.

In Pro, decide separately whether a field appears on the submission form, published listing and a dynamic filter. A useful field does not automatically need to become a filter.

Follow the steps

Create one useful classification

Write the question it answers

Use plain language such as “Who is this for?”, “Which region does it serve?” or “What accreditation does it hold?”.

Try the four standard choices first

Use Type, Mode, Tag or Price Range when one fits. Two classifications for the same idea produce conflicting filters and fragmented landing pages.

Choose Free or Pro deliberately

Stay with the four standard Free classifications when one fits. Use Pro for a custom field, custom classification or dynamic archive or map filter.

Create a controlled first set

In Pro, choose stable keys, clear labels and suitable field or hierarchy types, then add only the values publishers need now.

Test from submission to search

Complete the form as a contributor, edit the listing, view the published page and verify every intended Pro dynamic filter.

Taxonomy quality checklist

  • The concept applies to many listings
  • No built-in taxonomy already serves the same purpose
  • Slug is short, stable, lowercase, and unique
  • Label is clear to contributors and visitors
  • Hierarchy choice matches the term model
  • Initial terms follow one naming convention
  • Submit-form visibility is intentional
  • Overview and query behaviour has been tested
Helpful answers

Questions you may have

Should Audience be hierarchical?

Usually it can be non-hierarchical when values are peers such as Beginners, Families, or Professionals. Use hierarchy only when parent/child navigation is genuinely useful.

Will a custom classification automatically appear in every filter?

No. In Pro, choose which fields and classifications belong in each dynamic filter experience.

Can I rename a taxonomy slug after content exists?

Treat the slug as permanent. Changing it can disconnect existing term assignments. Update the public label instead, then keep the original slug in place.

Which classification features require Pro?

The live visual builder, global custom fields, custom classifications and dynamic archive and map filters are Pro. Free includes the four standard classifications and core filters needed for a conventional directory.