diff --git a/app/dashboards/detector/suggested_resource_dashboard.rb b/app/dashboards/detector/suggested_resource_dashboard.rb
index 83c6f6a..d866fdb 100644
--- a/app/dashboards/detector/suggested_resource_dashboard.rb
+++ b/app/dashboards/detector/suggested_resource_dashboard.rb
@@ -2,7 +2,7 @@
 
 require 'administrate/base_dashboard'
 
-module Detector
+class Detector
   class SuggestedResourceDashboard < Administrate::BaseDashboard
     # ATTRIBUTE_TYPES
     # a hash that describes the type of each of the model's fields.
diff --git a/app/models/category.rb b/app/models/category.rb
new file mode 100644
index 0000000..fe23b04
--- /dev/null
+++ b/app/models/category.rb
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: categories
+#
+#  id          :integer          not null, primary key
+#  name        :string
+#  description :text
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+class Category < ApplicationRecord
+  has_many :detector_categories, dependent: :destroy
+  has_many :detectors, through: :detector_categories
+end
diff --git a/app/models/detector.rb b/app/models/detector.rb
index 5694035..32480a2 100644
--- a/app/models/detector.rb
+++ b/app/models/detector.rb
@@ -1,9 +1,16 @@
 # frozen_string_literal: true
 
-# Detectors are classes that implement various algorithms that allow us to identify patterns
-# within search terms.
-module Detector
-  def self.table_name_prefix
-    'detector_'
-  end
+# == Schema Information
+#
+# Table name: detectors
+#
+#  id         :integer          not null, primary key
+#  name       :string
+#  confidence :float
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+class Detector < ApplicationRecord
+  has_many :detector_categories, dependent: :destroy
+  has_many :categories, through: :detector_categories
 end
diff --git a/app/models/detector/journal.rb b/app/models/detector/journal.rb
index ebcf50b..95f720a 100644
--- a/app/models/detector/journal.rb
+++ b/app/models/detector/journal.rb
@@ -10,12 +10,16 @@
 #  created_at      :datetime         not null
 #  updated_at      :datetime         not null
 #
-module Detector
+class Detector
   # Detector::Journal stores information about academic journals loaded from external sources to allow us to check our
   # incoming Terms against these information
   class Journal < ApplicationRecord
     before_save :downcase_fields!
 
+    def self.table_name_prefix
+      'detector_'
+    end
+
     # Identify journals in which the incoming phrase matches a Journal.name exactly
     #
     # @note We always store the Journal.name downcased, so we should also always downcase the phrase
diff --git a/app/models/detector/standard_identifiers.rb b/app/models/detector/standard_identifiers.rb
index 2a7f644..fe25b80 100644
--- a/app/models/detector/standard_identifiers.rb
+++ b/app/models/detector/standard_identifiers.rb
@@ -1,11 +1,15 @@
 # frozen_string_literal: true
 
-module Detector
+class Detector
   # Detector::StandardIdentifiers detects the identifiers DOI, ISBN, ISSN, PMID.
   # See /docs/reference/pattern_detection_and_enhancement.md for details.
   class StandardIdentifiers
     attr_reader :identifiers
 
+    def self.table_name_prefix
+      'detector_'
+    end
+
     def initialize(term)
       @identifiers = {}
       term_pattern_checker(term)
diff --git a/app/models/detector/suggested_resource.rb b/app/models/detector/suggested_resource.rb
index 11bd296..c257989 100644
--- a/app/models/detector/suggested_resource.rb
+++ b/app/models/detector/suggested_resource.rb
@@ -15,13 +15,17 @@
 
 require 'stringex/core_ext'
 
-module Detector
+class Detector
   # Detector::SuggestedResource stores custom hints that we want to send to the
   # user in response to specific strings. For example, a search for "web of
   # science" should be met with our custom login link to Web of Science via MIT.
   class SuggestedResource < ApplicationRecord
     before_save :update_fingerprint
 
+    def self.table_name_prefix
+      'detector_'
+    end
+
     # This exists for the before_save lifecycle hook to call the calculate_fingerprint method, to ensure that these
     # records always have a correctly-calculated fingerprint. It has no arguments and returns nothing.
     def update_fingerprint
diff --git a/app/models/detector_category.rb b/app/models/detector_category.rb
new file mode 100644
index 0000000..d322332
--- /dev/null
+++ b/app/models/detector_category.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: detector_categories
+#
+#  id          :integer          not null, primary key
+#  detector_id :integer          not null
+#  category_id :integer          not null
+#  confidence  :float
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+class DetectorCategory < ApplicationRecord
+  belongs_to :category
+  belongs_to :detector
+end
diff --git a/db/migrate/20240909183413_create_categories.rb b/db/migrate/20240909183413_create_categories.rb
new file mode 100644
index 0000000..49cc734
--- /dev/null
+++ b/db/migrate/20240909183413_create_categories.rb
@@ -0,0 +1,44 @@
+class CreateCategories < ActiveRecord::Migration[7.1]
+  def change
+    create_table :detectors do |t|
+      t.string :name
+      t.float :confidence
+
+      t.timestamps
+    end
+    add_index :detectors, :name, unique: true
+
+    create_table :categories do |t|
+      t.string :name
+      t.text :description
+
+      t.timestamps
+    end
+    add_index :categories, :name, unique: true
+
+    create_table :detector_categories do |t|
+      t.belongs_to :detector, null: false, foreign_key: true
+      t.belongs_to :category, null: false, foreign_key: true
+      t.float :confidence
+
+      t.timestamps
+    end
+
+    Detector.create(name: 'DOI', confidence: 0.95)
+    Detector.create(name: 'ISBN', confidence: 0.8)
+    Detector.create(name: 'ISSN', confidence: 0.6)
+    Detector.create(name: 'PMID', confidence: 0.95)
+    Detector.create(name: 'Journal', confidence: 0.2)
+    Detector.create(name: 'SuggestedResource', confidence: 0.95)
+
+    Category.create(name: 'Informational', description: 'A type of search where the user is looking for broad information, rather than an individual item. Also known as "open-ended" or "topical".')
+    Category.create(name: 'Navigational', description: 'A type of search where the user has a location in mind, and wants to go there. In library discovery, this should mean a URL that will not be in the searched index.')
+    Category.create(name: 'Transactional', description: 'A type of search where the user has an item in mind, and wants to get that item. Also known as "known-item".')
+
+    DetectorCategory.create(detector: Detector.find_by(name: 'DOI'), category: Category.find_by(name: 'Transactional'), confidence: 0.95)
+    DetectorCategory.create(detector: Detector.find_by(name: 'ISBN'), category: Category.find_by(name: 'Transactional'), confidence: 0.95)
+    DetectorCategory.create(detector: Detector.find_by(name: 'ISSN'), category: Category.find_by(name: 'Transactional'), confidence: 0.95)
+    DetectorCategory.create(detector: Detector.find_by(name: 'PMID'), category: Category.find_by(name: 'Transactional'), confidence: 0.95)
+    DetectorCategory.create(detector: Detector.find_by(name: 'Journal'), category: Category.find_by(name: 'Transactional'), confidence: 0.5)
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 5be5861..1f8de8d 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,25 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.1].define(version: 2024_08_13_181057) do
+ActiveRecord::Schema[7.1].define(version: 2024_09_09_183413) do
+  create_table "categories", force: :cascade do |t|
+    t.string "name"
+    t.text "description"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["name"], name: "index_categories_on_name", unique: true
+  end
+
+  create_table "detector_categories", force: :cascade do |t|
+    t.integer "detector_id", null: false
+    t.integer "category_id", null: false
+    t.float "confidence"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["category_id"], name: "index_detector_categories_on_category_id"
+    t.index ["detector_id"], name: "index_detector_categories_on_detector_id"
+  end
+
   create_table "detector_journals", force: :cascade do |t|
     t.string "name"
     t.json "additional_info"
@@ -30,6 +48,14 @@
     t.index ["phrase"], name: "index_detector_suggested_resources_on_phrase", unique: true
   end
 
+  create_table "detectors", force: :cascade do |t|
+    t.string "name"
+    t.float "confidence"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["name"], name: "index_detectors_on_name", unique: true
+  end
+
   create_table "metrics_algorithms", force: :cascade do |t|
     t.date "month"
     t.integer "doi"
@@ -69,4 +95,6 @@
     t.index ["uid"], name: "index_users_on_uid", unique: true
   end
 
+  add_foreign_key "detector_categories", "categories"
+  add_foreign_key "detector_categories", "detectors"
 end
diff --git a/test/fixtures/categories.yml b/test/fixtures/categories.yml
new file mode 100644
index 0000000..059d827
--- /dev/null
+++ b/test/fixtures/categories.yml
@@ -0,0 +1,21 @@
+# == Schema Information
+#
+# Table name: categories
+#
+#  id          :integer          not null, primary key
+#  name        :string
+#  description :text
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+informational:
+  name: 'Informational'
+  description: '...'
+
+navigational:
+  name: 'Navigational'
+  description: '...'
+
+transactional:
+  name: 'Transactional'
+  description: '...'
diff --git a/test/fixtures/detector_categories.yml b/test/fixtures/detector_categories.yml
new file mode 100644
index 0000000..0da5c5c
--- /dev/null
+++ b/test/fixtures/detector_categories.yml
@@ -0,0 +1,18 @@
+# == Schema Information
+#
+# Table name: detector_categories
+#
+#  id          :integer          not null, primary key
+#  detector_id :integer          not null
+#  category_id :integer          not null
+#  confidence  :float
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+one:
+  detector: doi
+  category: transactional
+
+two:
+  detector: isbn
+  category: transactional
diff --git a/test/fixtures/detectors.yml b/test/fixtures/detectors.yml
new file mode 100644
index 0000000..be890c4
--- /dev/null
+++ b/test/fixtures/detectors.yml
@@ -0,0 +1,21 @@
+# == Schema Information
+#
+# Table name: detectors
+#
+#  id         :integer          not null, primary key
+#  name       :string
+#  confidence :float
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+doi:
+  name: 'DOI'
+  confidence: 0.95
+
+isbn:
+  name: 'ISBN'
+  confidence: 0.8
+
+issn:
+  name: 'ISSN'
+  confidence: 0.6
diff --git a/test/models/category_test.rb b/test/models/category_test.rb
new file mode 100644
index 0000000..84755bb
--- /dev/null
+++ b/test/models/category_test.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: categories
+#
+#  id          :integer          not null, primary key
+#  name        :string
+#  description :text
+#  created_at  :datetime         not null
+#  updated_at  :datetime         not null
+#
+require 'test_helper'
+
+class CategoryTest < ActiveSupport::TestCase
+  test 'duplicate Categories are not allowed' do
+    initial_count = Category.count
+    Category.create!(name: 'Example')
+    assert_equal(initial_count + 1, Category.count)
+
+    assert_raises(ActiveRecord::RecordNotUnique) do
+      Category.create!(name: 'Example')
+    end
+  end
+
+  test 'destroying a Category will delete associated DetectorCategories' do
+    category_count = Category.count
+    link_count = DetectorCategory.count
+    record = categories('transactional')
+    link_category = record.detector_categories.count
+
+    record.destroy
+
+    assert_equal(category_count - 1, Category.count)
+    assert_equal(link_count - link_category, DetectorCategory.count)
+  end
+
+  test 'destroying a Category will not delete associated Detectors' do
+    category_count = Category.count
+    detector_count = Detector.count
+    record = categories('transactional')
+
+    record.destroy
+
+    assert_equal(category_count - 1, Category.count)
+    assert_equal(detector_count, Detector.count)
+  end
+end
diff --git a/test/models/detector/journal_test.rb b/test/models/detector/journal_test.rb
index ccfba12..9b5ba40 100644
--- a/test/models/detector/journal_test.rb
+++ b/test/models/detector/journal_test.rb
@@ -12,7 +12,7 @@
 #
 require 'test_helper'
 
-module Detector
+class Detector
   class JournalTest < ActiveSupport::TestCase
     test 'exact term match on journal name' do
       expected = detector_journals('the_new_england_journal_of_medicine')
@@ -57,4 +57,4 @@ class JournalTest < ActiveSupport::TestCase
       assert_equal(mixed_case.downcase, actual.name)
     end
   end
-end
+end
\ No newline at end of file
diff --git a/test/models/detector/standard_identifiers_test.rb b/test/models/detector/standard_identifiers_test.rb
index bee47d8..36c50cd 100644
--- a/test/models/detector/standard_identifiers_test.rb
+++ b/test/models/detector/standard_identifiers_test.rb
@@ -2,7 +2,7 @@
 
 require 'test_helper'
 
-module Detector
+class Detector
   class StandardIdentifiersTest < ActiveSupport::TestCase
     test 'ISBN detected in a string' do
       actual = Detector::StandardIdentifiers.new('test 978-3-16-148410-0 test').identifiers
@@ -191,4 +191,4 @@ class StandardIdentifiersTest < ActiveSupport::TestCase
       end
     end
   end
-end
+end
\ No newline at end of file
diff --git a/test/models/detector/suggested_resource_test.rb b/test/models/detector/suggested_resource_test.rb
index 815f497..efbb00a 100644
--- a/test/models/detector/suggested_resource_test.rb
+++ b/test/models/detector/suggested_resource_test.rb
@@ -14,7 +14,7 @@
 #
 require 'test_helper'
 
-module Detector
+class Detector
   class SuggestedResourceTest < ActiveSupport::TestCase
     test 'fingerprints are generated automatically' do
       resource = {
diff --git a/test/models/detector_test.rb b/test/models/detector_test.rb
new file mode 100644
index 0000000..b1a62e2
--- /dev/null
+++ b/test/models/detector_test.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+# == Schema Information
+#
+# Table name: detectors
+#
+#  id         :integer          not null, primary key
+#  name       :string
+#  confidence :float
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+require 'test_helper'
+
+class DetectorTest < ActiveSupport::TestCase
+  test 'duplicate Detectors are not allowed' do
+    detector_count = Detector.count
+    Detector.create!(name: 'Example')
+    assert_equal(detector_count + 1, Detector.count)
+
+    assert_raises(ActiveRecord::RecordNotUnique) do
+      Detector.create!(name: 'Example')
+    end
+  end
+
+  test 'destroying a Detector will delete associated DetectorCategories' do
+    detector_count = Detector.count
+    link_count = DetectorCategory.count
+    record = detectors('doi')
+    link_detector = record.detector_categories.count
+
+    record.destroy
+
+    assert_equal(detector_count - 1, Detector.count)
+    assert_equal(link_count - link_detector, DetectorCategory.count)
+  end
+
+  test 'destroying a Detector will not delete associated Categories' do
+    detector_count = Detector.count
+    category_count = Category.count
+    record = detectors('doi')
+
+    record.destroy
+
+    assert_equal(detector_count - 1, Detector.count)
+    assert_equal(category_count, Category.count)
+  end
+end