--- /dev/null
+<?php
+
+/*
+ * This file is part of the JsonSchema package.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace JsonSchema;
+
+/**
+ * @package JsonSchema
+ */
+interface UriRetrieverInterface
+{
+ /**
+ * Retrieve a URI
+ *
+ * @param string $uri JSON Schema URI
+ * @param null|string $baseUri
+ *
+ * @return object JSON Schema contents
+ */
+ public function retrieve($uri, $baseUri = null);
+}