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diff --git a/core/src/main/java/com/att/cadi/taf/HttpTaf.java b/core/src/main/java/com/att/cadi/taf/HttpTaf.java
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+/*******************************************************************************
+ * ============LICENSE_START====================================================
+ * * org.onap.aai
+ * * ===========================================================================
+ * * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * * Copyright © 2017 Amdocs
+ * * ===========================================================================
+ * * 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.
+ * * ============LICENSE_END====================================================
+ * *
+ * * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ * *
+ ******************************************************************************/
+package com.att.cadi.taf;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import com.att.cadi.CachedPrincipal;
+import com.att.cadi.Taf.LifeForm;
+
+/**
+ * A TAF which is in a specific HTTP environment in which the engine implements 
+ * javax Servlet.
+ * 
+ * Using the Http Request and Response interfaces takes the effort out of implementing in almost any kind of
+ * HTTP Container or Engine.
+ *  
+ *
+ */
+public interface HttpTaf {
+	/**
+	 * validate
+	 * 
+	 * Validate the Request, and respond with created TafResp object.
+	 * 
+	 * @param reading
+	 * @param req
+	 * @param resp
+	 * @return
+	 */
+	public TafResp validate(LifeForm reading, HttpServletRequest req, HttpServletResponse resp);
+	
+	/**
+	 * Re-Validate Credential
+	 * 
+	 * @param prin
+	 * @return
+	 */
+	public CachedPrincipal.Resp revalidate(CachedPrincipal prin);
+}