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/*******************************************************************************
 * Copyright (c) 2010 Haifeng Li
 *   
 * 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.
 *******************************************************************************/

/**
 * A taxonomy is a tree of terms (concepts) where leaves
 * must be named but intermediary nodes can be anonymous.
 * Concept is a set of synonyms, i.e. group of words that are roughly
 * synonymous in a given context.
 * The distance between two concepts a and b is defined by the length of the
 * path from a to their lowest common ancestor and then to b.
 *
 * @author Haifeng Li
 */
package smile.taxonomy;