Bug 121352 The data set binding property cannot be retrieved in report preview layout
In report preview page, the datasource/dataset property binding lists cannot be retrieved. The dataset binding can not work correctly in layout preview because it's value cannot get from the binding list. But in the data set edit page, the binding value can be got. You can refer to the attachment.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
* 
	 * @param baseId
	 *            The id reference element.
	 */
	public void setBaseId( long baseId )
	{
		this.baseId = baseId;
	}
	/**
	 * @return Returns the idRef.
	 */
	public long getBaseId( )
	{
		return baseId;
	}
	/**
	 * Clears local properties of the element.
	 */
	public void clearAllProperties( )
	{
		this.name = null;
		this.extendsRef = null;
		propValues.clear( );
	}
	/**
	 * Determines whether this element and its contents are managed by
	 * namespace. If this element is a pending node and not in any module, or it
	 * is contained in a slot that is not managed by namespace, then return
	 * false. Otherwise true.
	 *