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diff --git a/rosetta/src/main/java/com/att/rosetta/Marshal.java b/rosetta/src/main/java/com/att/rosetta/Marshal.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.rosetta;
+
+import java.util.Iterator;
+
+import com.att.inno.env.Env;
+import com.att.inno.env.TimeTaken;
+
+public abstract class Marshal<T> implements Parse<T, Marshal.State> {
+
+	/* (non-Javadoc)
+	 * @see com.att.rosetta.Parse#newParsed()
+	 */
+	@Override
+	public Parsed<State> newParsed() throws ParseException {
+		return new Parsed<State>(new State());
+	}
+
+	@Override
+	public TimeTaken start(Env env) {
+		//TODO is a way to mark not-JSON?
+		return env.start("Rosetta Marshal", Env.JSON);
+	};
+
+	public static class State {
+		// Note:  Need a STATEFUL stack... one that will remain stateful until marked as finished
+		// "finished" is know by Iterators with no more to do/null
+		// Thus the concept of "Ladder", which one ascends and decends
+		public Ladder<Iterator<?>> ladder = new Ladder<Iterator<?>>();
+		public boolean smallest = true;
+	}
+
+	public static final Iterator<Void> DONE_ITERATOR = new Iterator<Void>() {
+		@Override
+		public boolean hasNext() {
+			return false;
+		}
+
+		@Override
+		public Void next() {
+			return null;
+		}
+
+		@Override
+		public void remove() {
+		}
+	};
+
+	/**
+	 * Typical definition of Done is when Iterator in Ladder is "DONE_ITERATOR"
+	 * 
+	 * It is important, however, that the "Ladder Rung" is set to the right level.
+	 * 
+	 * @param state
+	 * @return
+	 */
+	public boolean amFinished(State state) {
+		return DONE_ITERATOR.equals(state.ladder.peek());
+	}
+
+}