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diff --git a/lib/public/WorkflowEngine/EntityContext/IContextPortation.php b/lib/public/WorkflowEngine/EntityContext/IContextPortation.php
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+++ b/lib/public/WorkflowEngine/EntityContext/IContextPortation.php
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+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020 Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it w	ill be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\WorkflowEngine\EntityContext;
+
+/**
+ * Interface IContextPortation
+ *
+ * Occasionally an IEntity needs to be reused not in the same, but a new
+ * request. As IEntities receive custom context information during a flow
+ * cycle, sometimes it might be necessary to export context identifiers to
+ * be able to recreate the state at a later point. For example: handling
+ * translations in a notification INotifier.
+ *
+ * @package OCP\WorkflowEngine\EntityContext
+ *
+ * @since 20.0.0
+ */
+interface IContextPortation {
+
+	/**
+	 * All relevant context identifiers that are needed to restore the state
+	 * of an entity shall be returned with this method. The resulting array
+	 * must be JSON-serializable.
+	 *
+	 * @since 20.0.0
+	 */
+	public function exportContextIDs(): array;
+
+	/**
+	 * This method receives the array as returned by `exportContextIDs()` in
+	 * order to restore the state of the IEntity if necessary.
+	 *
+	 * @since 20.0.0
+	 */
+	public function importContextIDs(array $contextIDs): void;
+}