Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
* @param namespace
	 *            library namespace
	 * @return the loaded library
	 * @throws DesignFileException
	 *             if the library file has fatal error.
	 */
	public Library loadLibrary( String libraryFileName, String namespace )
			throws DesignFileException
	{
		if ( libraries == null )
			libraries = new ArrayList( );
		URL url = findResource( libraryFileName, IResourceLocator.LIBRARY );
		if ( url == null )
		{
			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 );
		}
		try
		{
			Library library = LibraryReader.getInstance( ).read( session, this,
					url.toString( ), namespace, url.openStream( ), null );
			if ( StringUtil.isBlank( namespace ) )
			{
				library.setNamespace( StringUtil
						.extractFileName( libraryFileName ) );
			}