new String[] { "tag1" }, new String[] { SuggestConstants.DEFAULT_ROLE }, null, SuggestItem.Kind.QUERY);
        }
        suggester.indexer().index(items);
        suggester.refresh();
    }

---

## Key Components

### Suggester (Main Entry Point)
Location: `src/main/java/org/codelibs/fess/suggest/Suggester.java`

Main operations: `suggest()`, `popularWords()`, `indexer()`, `createIndexIfNothing()`, `createNextIndex()`, `switchIndex()`, `removeDisableIndices()`

### SuggestIndexer (Indexing Engine)
Location: `src/main/java/org/codelibs/fess/suggest/index/SuggestIndexer.java`

 * 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.codelibs.fess.indexer;

import java.util.Map;

import org.codelibs.fess.Constants;
import org.codelibs.fess.opensearch.config.exentity.BoostDocumentRule;
import org.codelibs.fess.util.ComponentUtil;

/**

import org.lastaflute.db.direction.FwDbDirection;
import org.lastaflute.web.direction.FwWebDirection;
import org.lastaflute.web.ruts.process.ActionRuntime;
import org.lastaflute.web.ruts.renderer.JspHtmlRenderingProvider;

import jakarta.annotation.Resource;

/**
 * The framework assistant director for Fess.
 *
 * @author jflute
 */

 *   <li>{@link #switchIndex()}: Switches the search alias to the current update index.</li>
 *   <li>{@link #removeDisableIndices()}: Removes disabled indices.</li>
 *   <li>{@link #indexer()}: Creates a new SuggestIndexer for indexing suggestions.</li>
 *   <li>{@link #builder()}: Creates a new SuggesterBuilder for building Suggester instances.</li>
 *   <li>{@link #settings()}: Returns the SuggestSettings instance.</li>

import org.codelibs.fess.crawler.service.impl.OpenSearchUrlFilterService;
import org.codelibs.fess.crawler.service.impl.OpenSearchUrlQueueService;
import org.codelibs.fess.indexer.IndexUpdater;
import org.codelibs.fess.opensearch.config.exbhv.BoostDocumentRuleBhv;
import org.codelibs.fess.opensearch.config.exentity.BoostDocumentRule;

3. Creates language-specific fields (e.g., `content_ja`, `title_en`, `content_sv`)
4. Applies language-specific analyzers for better search results

Configured in `fess_config.properties`:
```properties
indexer.language.fields=content,important_content,title
```

## Optional: Search Analysis Support

If your language requires special text analysis (stemming, stop words, etc.), you may need to configure OpenSearch analyzers.

labels.facet_filetype_python=Python
labels.facet_filetype_ruby=Ruby
labels.facet_filetype_scala=Scala
labels.facet_filetype_shell=Shell-Skript
labels.facet_filetype_vb=Visual Basic
labels.facet_filetype_others=Andere
labels.facet_label_reset=Zurücksetzen
labels.searchoptions_all=Alle
labels.searchoptions_score=Punktzahl
labels.searchoptions_menu_sort=Sortieren
labels.searchoptions_menu_num=Anzahl

import org.codelibs.fess.helper.UserAgentHelper;
import org.codelibs.fess.helper.UserInfoHelper;
import org.codelibs.fess.helper.ViewHelper;
import org.codelibs.fess.helper.VirtualHostHelper;
import org.codelibs.fess.indexer.IndexUpdater;
import org.codelibs.fess.ingest.IngestFactory;
import org.codelibs.fess.job.JobExecutor;
import org.codelibs.fess.ldap.LdapManager;
import org.codelibs.fess.mylasta.direction.FessConfig;