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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.
 */

/**
 * 

* This package contains the main logic for performing the reranking using * a Learning to Rank model. *

*

* A model will be applied on each document through a {@link org.apache.solr.ltr.LTRScoringQuery}, a * subclass of {@link org.apache.lucene.search.Query}. As a normal query, * the learned model will produce a new score * for each document reranked. *

*

* A {@link org.apache.solr.ltr.LTRScoringQuery} is created by providing an instance of * {@link org.apache.solr.ltr.model.LTRScoringModel}. An instance of * {@link org.apache.solr.ltr.model.LTRScoringModel} * defines how to combine the features in order to create a new * score for a document. A new Learning to Rank model is plugged * into the framework by extending {@link org.apache.solr.ltr.model.LTRScoringModel}, * (see for example {@link org.apache.solr.ltr.model.MultipleAdditiveTreesModel} and {@link org.apache.solr.ltr.model.LinearModel}). *

*

* The {@link org.apache.solr.ltr.LTRScoringQuery} will take care of computing the values of * all the features (see {@link org.apache.solr.ltr.feature.Feature}) and then will delegate the final score * generation to the {@link org.apache.solr.ltr.model.LTRScoringModel}, by calling the method * {@link org.apache.solr.ltr.model.LTRScoringModel#score(float[] modelFeatureValuesNormalized) score(float[] modelFeatureValuesNormalized)}. *

*/ package org.apache.solr.ltr;




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