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diff --git a/src/main/java/org/apache/commons/math3/genetics/PermutationChromosome.java b/src/main/java/org/apache/commons/math3/genetics/PermutationChromosome.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.commons.math3.genetics;
+
+import java.util.List;
+
+/**
+ * Interface indicating that the chromosome represents a permutation of objects.
+ *
+ * @param <T> type of the permuted objects
+ * @since 2.0
+ */
+public interface PermutationChromosome<T> {
+
+    /**
+     * Permutes the <code>sequence</code> of objects of type T according to the permutation this
+     * chromosome represents. For example, if this chromosome represents a permutation (3,0,1,2),
+     * and the unpermuted sequence is (a,b,c,d), this yields (d,a,b,c).
+     *
+     * @param sequence the unpermuted (original) sequence of objects
+     * @return permutation of <code>sequence</code> represented by this permutation
+     */
+    List<T> decode(List<T> sequence);
+}