### Key Extractors

`TikaExtractor` (1000+ formats), `PdfExtractor`, `MsWordExtractor`, `MsExcelExtractor`, `MsPowerPointExtractor`, `ZipExtractor`, `HtmlExtractor`, etc.

**Registration**:
```java
extractorFactory.addExtractor("text/html", htmlExtractor, 2);  // Weight 2
extractorFactory.addExtractor("text/html", tikaExtractor, 1);  // Fallback
```

### Helpers

		class="org.codelibs.fess.crawler.extractor.impl.LhaExtractor" />
	<component name="textExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.TextExtractor" />
	<component name="htmlExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.HtmlExtractor">
		<property name="featureMap">
			<component class="java.util.LinkedHashMap">
				<postConstruct name="put">
					<arg>"http://xml.org/sax/features/namespaces"</arg>