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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* The federation layer on top of the search container. This contains
*
* <ul>
* <li>A model of Sources which can be selected in and for a Query and which are implemented
* by a Search Chain, and Providers which represents the connection to specific backends (these
* two are often 1-1 but not always)
* <li>The federation searcher responsible for forking a query to multiple sources in parallel
* <li>A simple searcher which can talk to other vespa services
* </ul>
*/
@ExportPackage
package com.yahoo.search.federation;
import com.yahoo.api.annotations.PublicApi;
import com.yahoo.osgi.annotation.ExportPackage;
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