--- /dev/null
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\CssSelector\XPath;
+
+use Symfony\Component\CssSelector\Node\SelectorNode;
+
+/**
+ * XPath expression translator interface.
+ *
+ * This component is a port of the Python cssselect library,
+ * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
+ *
+ * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
+ *
+ * @internal
+ */
+interface TranslatorInterface
+{
+ /**
+ * Translates a CSS selector to an XPath expression.
+ *
+ * @param string $cssExpr
+ * @param string $prefix
+ *
+ * @return string
+ */
+ public function cssToXPath($cssExpr, $prefix = 'descendant-or-self::');
+
+ /**
+ * Translates a parsed selector node to an XPath expression.
+ *
+ * @param SelectorNode $selector
+ * @param string $prefix
+ *
+ * @return string
+ */
+ public function selectorToXPath(SelectorNode $selector, $prefix = 'descendant-or-self::');
+}