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diff --git a/web/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php b/web/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php
new file mode 100644
index 000000000..561a9afe8
--- /dev/null
+++ b/web/core/modules/taxonomy/src/Plugin/migrate/D7TaxonomyTermDeriver.php
@@ -0,0 +1,170 @@
+<?php
+
+namespace Drupal\taxonomy\Plugin\migrate;
+
+use Drupal\Component\Plugin\Derivative\DeriverBase;
+use Drupal\Component\Plugin\Exception\PluginNotFoundException;
+use Drupal\Core\Database\DatabaseExceptionWrapper;
+use Drupal\Core\Plugin\Discovery\ContainerDeriverInterface;
+use Drupal\migrate\Exception\RequirementsException;
+use Drupal\migrate\Plugin\MigrationDeriverTrait;
+use Drupal\migrate_drupal\Plugin\MigrateCckFieldPluginManagerInterface;
+use Drupal\migrate_drupal\Plugin\MigrateFieldPluginManagerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Deriver for Drupal 7 taxonomy term migrations based on vocabularies.
+ */
+class D7TaxonomyTermDeriver extends DeriverBase implements ContainerDeriverInterface {
+
+  use MigrationDeriverTrait;
+
+  /**
+   * The base plugin ID this derivative is for.
+   *
+   * @var string
+   */
+  protected $basePluginId;
+
+  /**
+   * Already-instantiated cckfield plugins, keyed by ID.
+   *
+   * @var \Drupal\migrate_drupal\Plugin\MigrateCckFieldInterface[]
+   */
+  protected $cckPluginCache;
+
+  /**
+   * The CCK plugin manager.
+   *
+   * @var \Drupal\migrate_drupal\Plugin\MigrateCckFieldPluginManagerInterface
+   */
+  protected $cckPluginManager;
+
+  /**
+   * Already-instantiated field plugins, keyed by ID.
+   *
+   * @var \Drupal\migrate_drupal\Plugin\MigrateFieldInterface[]
+   */
+  protected $fieldPluginCache;
+
+  /**
+   * The field plugin manager.
+   *
+   * @var \Drupal\migrate_drupal\Plugin\MigrateFieldPluginManagerInterface
+   */
+  protected $fieldPluginManager;
+
+  /**
+   * D7TaxonomyTermDeriver constructor.
+   *
+   * @param string $base_plugin_id
+   *   The base plugin ID for the plugin ID.
+   * @param \Drupal\migrate_drupal\Plugin\MigrateCckFieldPluginManagerInterface $cck_manager
+   *   The CCK plugin manager.
+   * @param \Drupal\migrate_drupal\Plugin\MigrateFieldPluginManagerInterface $field_manager
+   *   The field plugin manager.
+   */
+  public function __construct($base_plugin_id, MigrateCckFieldPluginManagerInterface $cck_manager, MigrateFieldPluginManagerInterface $field_manager) {
+    $this->basePluginId = $base_plugin_id;
+    $this->cckPluginManager = $cck_manager;
+    $this->fieldPluginManager = $field_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, $base_plugin_id) {
+    return new static(
+      $base_plugin_id,
+      $container->get('plugin.manager.migrate.cckfield'),
+      $container->get('plugin.manager.migrate.field')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getDerivativeDefinitions($base_plugin_definition) {
+    $fields = [];
+    try {
+      $source_plugin = static::getSourcePlugin('d7_field_instance');
+      $source_plugin->checkRequirements();
+
+      // Read all field instance definitions in the source database.
+      foreach ($source_plugin as $row) {
+        if ($row->getSourceProperty('entity_type') == 'taxonomy_term') {
+          $fields[$row->getSourceProperty('bundle')][$row->getSourceProperty('field_name')] = $row->getSource();
+        }
+      }
+    }
+    catch (RequirementsException $e) {
+      // If checkRequirements() failed then the field module did not exist and
+      // we do not have any fields. Therefore, $fields will be empty and below
+      // we'll create a migration just for the node properties.
+    }
+
+    $vocabulary_source_plugin = static::getSourcePlugin('d7_taxonomy_vocabulary');
+    try {
+      $vocabulary_source_plugin->checkRequirements();
+    }
+    catch (RequirementsException $e) {
+      // If the d7_taxonomy_vocabulary requirements failed, that means we do not
+      // have a Drupal source database configured - there is nothing to
+      // generate.
+      return $this->derivatives;
+    }
+
+    try {
+      foreach ($vocabulary_source_plugin as $row) {
+        $bundle = $row->getSourceProperty('machine_name');
+        $values = $base_plugin_definition;
+
+        $values['label'] = t('@label (@type)', [
+          '@label' => $values['label'],
+          '@type' => $row->getSourceProperty('name'),
+        ]);
+        $values['source']['bundle'] = $bundle;
+        $values['destination']['default_bundle'] = $bundle;
+
+        /** @var Migration $migration */
+        $migration = \Drupal::service('plugin.manager.migration')->createStubMigration($values);
+        if (isset($fields[$bundle])) {
+          foreach ($fields[$bundle] as $field_name => $info) {
+            $field_type = $info['type'];
+            try {
+              $plugin_id = $this->fieldPluginManager->getPluginIdFromFieldType($field_type, ['core' => 7], $migration);
+              if (!isset($this->fieldPluginCache[$field_type])) {
+                $this->fieldPluginCache[$field_type] = $this->fieldPluginManager->createInstance($plugin_id, ['core' => 7], $migration);
+              }
+              $this->fieldPluginCache[$field_type]
+                ->processFieldValues($migration, $field_name, $info);
+            }
+            catch (PluginNotFoundException $ex) {
+              try {
+                $plugin_id = $this->cckPluginManager->getPluginIdFromFieldType($field_type, ['core' => 7], $migration);
+                if (!isset($this->cckPluginCache[$field_type])) {
+                  $this->cckPluginCache[$field_type] = $this->cckPluginManager->createInstance($plugin_id, ['core' => 7], $migration);
+                }
+                $this->cckPluginCache[$field_type]
+                  ->processCckFieldValues($migration, $field_name, $info);
+              }
+              catch (PluginNotFoundException $ex) {
+                $migration->setProcessOfProperty($field_name, $field_name);
+              }
+            }
+          }
+        }
+        $this->derivatives[$bundle] = $migration->getPluginDefinition();
+      }
+    }
+    catch (DatabaseExceptionWrapper $e) {
+      // Once we begin iterating the source plugin it is possible that the
+      // source tables will not exist. This can happen when the
+      // MigrationPluginManager gathers up the migration definitions but we do
+      // not actually have a Drupal 7 source database.
+    }
+
+    return $this->derivatives;
+  }
+
+}