package-info.java

/*
 * 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
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 */
 
/** 
 * Necessary interfaces to implement text parsers.
 * 
 * <h2>Parser</h2>
 * <p>
 * The package <tt>org.apache.lucene.queryparser.flexible.parser</tt> contains interfaces
 * that should be implemented by the parsers.
 * 
 * Parsers produce QueryNode Trees from a string object.
 * These package still needs some work to add support to for multiple parsers.
 * 
 * Features that should be supported for the future, related with the parser:
 * - QueryNode tree should be able convertible to any parser syntax.
 * - The query syntax should support calling other parsers.
 * - QueryNode tree created by multiple parsers.
 */
package org.apache.lucene.queryparser.flexible.core.parser;