--- /dev/null
+<?php
+
+namespace Drupal\taxonomy\Plugin\migrate\source\d6;
+
+use Drupal\migrate\Row;
+use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
+use Drupal\Core\Field\FieldStorageDefinitionInterface;
+
+/**
+ * Drupal 6 vocabularies source from database.
+ *
+ * @MigrateSource(
+ * id = "d6_taxonomy_vocabulary",
+ * source_provider = "taxonomy"
+ * )
+ */
+class Vocabulary extends DrupalSqlBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function query() {
+ $query = $this->select('vocabulary', 'v')
+ ->fields('v', [
+ 'vid',
+ 'name',
+ 'description',
+ 'help',
+ 'relations',
+ 'hierarchy',
+ 'multiple',
+ 'required',
+ 'tags',
+ 'module',
+ 'weight',
+ ]);
+ return $query;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function fields() {
+ return [
+ 'vid' => $this->t('The vocabulary ID.'),
+ 'name' => $this->t('The name of the vocabulary.'),
+ 'description' => $this->t('The description of the vocabulary.'),
+ 'help' => $this->t('Help text to display for the vocabulary.'),
+ 'relations' => $this->t('Whether or not related terms are enabled within the vocabulary. (0 = disabled, 1 = enabled)'),
+ 'hierarchy' => $this->t('The type of hierarchy allowed within the vocabulary. (0 = disabled, 1 = single, 2 = multiple)'),
+ 'multiple' => $this->t('Whether or not multiple terms from this vocabulary may be assigned to a node. (0 = disabled, 1 = enabled)'),
+ 'required' => $this->t('Whether or not terms are required for nodes using this vocabulary. (0 = disabled, 1 = enabled)'),
+ 'tags' => $this->t('Whether or not free tagging is enabled for the vocabulary. (0 = disabled, 1 = enabled)'),
+ 'weight' => $this->t('The weight of the vocabulary in relation to other vocabularies.'),
+ 'parents' => $this->t("The Drupal term IDs of the term's parents."),
+ 'node_types' => $this->t('The names of the node types the vocabulary may be used with.'),
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function prepareRow(Row $row) {
+ // Find node types for this row.
+ $node_types = $this->select('vocabulary_node_types', 'nt')
+ ->fields('nt', ['type', 'vid'])
+ ->condition('vid', $row->getSourceProperty('vid'))
+ ->execute()
+ ->fetchCol();
+ $row->setSourceProperty('node_types', $node_types);
+ $row->setSourceProperty('cardinality', ($row->getSourceProperty('tags') == 1 || $row->getSourceProperty('multiple') == 1) ? FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED : 1);
+ return parent::prepareRow($row);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getIds() {
+ $ids['vid']['type'] = 'integer';
+ return $ids;
+ }
+
+}