Bug 130492 Provide a method to serialize the report with library information.
Currently, when engine generate the report document file, the document does not contain any library information. That will cause many propblem on server side. Model should provide a method to serialize the report with library information to a stream so that the generated report document can contain all information that the report need.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/elements/JointDataSet.java
*/
	public JointDataSet( )
	{
		super( );
	}
	/**
	 * Constructs this joint data set with a required name.
	 * 
	 * @param theName
	 *            the required name
	 */
	public JointDataSet( String theName )
	{
		super( theName );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#apply(org.eclipse.birt.report.model.elements.ElementVisitor)
	 */
	public void apply( ElementVisitor visitor )
	{
		visitor.visitJointDataSet( this );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#getElementName()
	 */
	public String getElementName( )