--- /dev/null
+/**
+ * Implements hook_field_attach_purge().
+ */
+function {{ machine_name }}_field_attach_purge($entity_type, $entity, $field, $instance) {
+ // find the corresponding data in mymodule and purge it
+ if ($entity_type == 'node' && $field->field_name == 'my_field_name') {
+ mymodule_remove_mydata($entity->nid);
+ }
+}