--- /dev/null
+<?php
+/**
+ * Copyright 2011-2017 Fabrizio Branca. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * @package WebDriver
+ *
+ * @author Fabrizio Branca <mail@fabrizio-branca.de>
+ * @author Anthon Pang <apang@softwaredevelopment.ca>
+ */
+
+namespace WebDriver;
+
+/**
+ * WebDriver\Capability class
+ *
+ * @package WebDriver
+ */
+class Capability
+{
+ /**
+ * Desired capabilities
+ *
+ * @see http://code.google.com/p/selenium/source/browse/trunk/java/client/src/org/openqa/selenium/remote/CapabilityType.java
+ * @see http://code.google.com/p/selenium/wiki/JsonWireProtocol#Capabilities_JSON_Object
+ */
+ const BROWSER_NAME = 'browserName';
+ const VERSION = 'version';
+ const PLATFORM = 'platform';
+ const JAVASCRIPT_ENABLED = 'javascriptEnabled';
+ const TAKES_SCREENSHOT = 'takesScreenshot';
+ const HANDLES_ALERTS = 'handlesAlerts';
+ const DATABASE_ENABLED = 'databaseEnabled';
+ const LOCATION_CONTEXT_ENABLED = 'locationContextEnabled';
+ const APPLICATION_CACHE_ENABLED = 'applicationCacheEnabled';
+ const BROWSER_CONNECTION_ENABLED = 'browserConnectionEnabled';
+ const CSS_SELECTORS_ENABLED = 'cssSelectorsEnabled';
+ const WEB_STORAGE_ENABLED = 'webStorageEnabled';
+ const ROTATABLE = 'rotatable';
+ const ACCEPT_SSL_CERTS = 'acceptSslCerts';
+ const NATIVE_EVENTS = 'nativeEvents';
+ const PROXY = 'proxy';
+ const UNEXPECTED_ALERT_BEHAVIOUR = 'unexpectedAlertBehaviour';
+ const ELEMENT_SCROLL_BEHAVIOR = 'elementScrollBehavior';
+
+ /**
+ * Proxy types
+ *
+ * @see http://code.google.com/p/selenium/wiki/JsonWireProtocol#Proxy_JSON_Object
+ */
+ const DIRECT = 'direct';
+ const MANUAL = 'manual';
+ const PAC = 'pac';
+ const AUTODETECT = 'autodetect';
+ const SYSTEM = 'system';
+}