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/Module.java
try
		{
			Library library = LibraryReader.getInstance( ).read( session, this,
					url.toString( ), namespace, url.openStream( ) );
			if ( StringUtil.isBlank( namespace ) )
			{
				library.setNamespace( StringUtil
						.extractFileName( libraryFileName ) );
			}
			return library;
		}
		catch ( IOException e )
		{
			DesignParserException ex = new DesignParserException(
					new String[]{libraryFileName},
					DesignParserException.DESIGN_EXCEPTION_FILE_NOT_FOUND );
			List exceptionList = new ArrayList( );
			exceptionList.add( ex );
			throw new DesignFileException( libraryFileName, exceptionList );
		}
	}
	/**
	 * Loads library with given library file name. This method will add library
	 * into this module even if the library file is not found or has fatal
	 * error.
	 * 
	 * @param includeLibrary
	 *            library file name
	 * @see #loadLibrary(String, String)
	 */