*/
    private static final String EXCLUDE = "exclude";

    /**
     * Cache for include filters.
     */
    protected LoadingCache<String, List<Pattern>> includeFilterCache;

    /**
     * Cache for exclude filters.
     */
    protected LoadingCache<String, List<Pattern>> excludeFilterCache;

    /**
     * The expiration time for the filter cache in seconds.
     */

import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.InputSource;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;

import jakarta.annotation.Resource;

/**
 * {@link HtmlXpathExtractor} is an implementation of the {@link org.codelibs.fess.crawler.extractor.Extractor} interface.

import org.w3c.dom.Document;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;

import jakarta.annotation.Resource;

/**
 * <p>
 * XmlTransformer is a class that extends AbstractTransformer to transform XML documents into a specific format for indexing.