relaxng の validation

xml - Using Jing with Google App Engine. Can't load SchemaFactory given Relax NG schema. - Stack Overflow
http://stackoverflow.com/questions/4983057/using-jing-with-google-app-engine-cant-load-schemafactory-given-relax-ng-schema

		<dependency>
			<groupId>com.thaiopensource</groupId>
			<artifactId>jing</artifactId>
			<version>20091111</version>
		</dependency>

import com.thaiopensource.relaxng.jaxp.XMLSyntaxSchemaFactory;
        SchemaFactory factory = new XMLSyntaxSchemaFactory();
        Source schemaFile = new StreamSource(new File("sources.rng"));
        //Source schemaFile = new StreamSource(inputStream);
        Schema schema = factory.newSchema(schemaFile);

少なくともschemaがnullでないということはわかった。