Bug 136279 Structure and table datatypes should be hidden.
Description: Structure and table datatype should be hidden. Steps to reproduce: In table data binding, I saw structure and table two datatypes. They are not supported now, so they should be removed.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ReportDesignHandle.java
public SlotHandle getBody( )
	{
		return getSlot( BODY_SLOT );
	}
	/**
	 * Returns the refresh rate when viewing the report.
	 * 
	 * @return the refresh rate
	 */
	public int getRefreshRate( )
	{
		return getIntProperty( REFRESH_RATE_PROP );
	}
	/**
	 * Returns a slot handle to work with the scratched elements within the
	 * report, which are no longer needed or are in the process of rearranged.
	 * 
	 * @return A handle for working with the scratched elements.
	 */
	public SlotHandle getScratchPad( )
	{
		return getSlot( SCRATCH_PAD_SLOT );
	}
	/**
	 * Returns the iterator over all included scripts. Each one is the instance
	 * of <code>IncludeScriptHandle</code>
	 * 
	 * @return the iterator over all included scripts.
	 * @see IncludeScriptHandle
	 */