*/
    protected boolean namespaceAware;

    /**
     * If true, the parser will convert CDATA nodes to Text nodes and append them to the adjacent Text node.
     */
    protected boolean coalescing;

    /**
     * If true, the parser will expand entity reference nodes.
     */
    protected boolean expandEntityRef = false;

    /**
     * If true, the parser will ignore comments.

    }

    /**
     * Gets the XPath expression for selecting target nodes.
     *
     * @return the target node path
     */
    public String getTargetNodePath() {
        return targetNodePath;
    }

    /**
     * Sets the XPath expression for selecting target nodes.
     *
     * @param targetNodePath the target node path to set
     */

        assertEquals("http://hoge/index.html", htmlTransformer.normalizeUrl(url));

        url = "http://hoge/a/index.html";
        assertEquals("http://hoge/a/index.html", htmlTransformer.normalizeUrl(url));

        url = "://hoge/index.html";
        assertEquals("://hoge/index.html", htmlTransformer.normalizeUrl(url));

        url = "://hoge//index.html";
        assertEquals("://hoge/index.html", htmlTransformer.normalizeUrl(url));

    }

    /**
     * Gets the OpenSearch index name.
     *
     * @return The index name.
     */
    public String getIndex() {
        return index;
    }

    /**
     * Sets the OpenSearch index name.
     *
     * @param index The index name.
     */
    public void setIndex(final String index) {
        this.index = index;
    }

    /**

            if (logger.isDebugEnabled()) {
                logger.debug("Failed to create index. index: {}", index, e);
            }
            throw new SuggesterException("Failed to create index.", e);
        }
    }

    /**
     * Creates a new index and replaces the current update alias with the new index.
     */
    public void createNextIndex() {
        try {

import org.codelibs.fess.suggest.entity.ElevateWord;
import org.codelibs.fess.suggest.entity.SuggestItem;
import org.codelibs.fess.suggest.index.SuggestIndexResponse;
import org.codelibs.fess.suggest.index.contents.document.ESSourceReader;
import org.codelibs.fess.suggest.index.contents.querylog.QueryLog;
import org.codelibs.fess.suggest.index.contents.querylog.QueryLogReader;
import org.codelibs.fess.suggest.request.popularwords.PopularWordsResponse;

import org.codelibs.fess.suggest.index.contents.ContentsParser;
import org.codelibs.fess.suggest.index.contents.DefaultContentsParser;
import org.codelibs.fess.suggest.index.contents.document.DocumentReader;
import org.codelibs.fess.suggest.index.contents.querylog.QueryLog;
import org.codelibs.fess.suggest.index.contents.querylog.QueryLogReader;
import org.codelibs.fess.suggest.index.writer.SuggestIndexWriter;

    });
```

## Advanced Usage

### Index from Existing Documents

```java
import org.codelibs.fess.suggest.index.contents.document.ESSourceReader;

// Index suggestions from existing Elasticsearch documents
DocumentReader reader = new ESSourceReader(
    client,
    suggester.settings(),
    "content-index",        // source index
    "document"             // document type
);

        return client.index(request);
    }

    /**
     * Executes an index request asynchronously.
     *
     * @param request The index request.
     * @param listener The response listener.
     */
    @Override
    public void index(final IndexRequest request, final ActionListener<IndexResponse> listener) {
        client.index(request, listener);
    }

    /**

    public void testSpecialCharactersInIndexName() {
        // Test index name with special characters
        builder.setSettingsIndexName("Test-Index_Name.2024");
        assertEquals("test-index_name.2024", builder.settingsIndexName);

        // Test index name with spaces (should be lowercased)
        builder.setSettingsIndexName("Test Index Name");
        assertEquals("test index name", builder.settingsIndexName);
    }

    @Test