question: public static Transformer createTtmlTransformer ( String xslt ) { TransformerFactory tf = TransformerFactory . newInstance ( XSLT2_TRANSFORMER_IMPLEMENTATION , null ) ; InputStream transformationStream = ResourceHelper . getResourceInputStream ( xslt ) ; if ( transformationStream == null ) { throw new ConvertException ( String . format ( "The transformation file is absent: %s" , xslt ) ) ; } try { return tf . newTransformer ( new StreamSource ( transformationStream ) ) ; } catch ( TransformerConfigurationException e ) { throw new ConvertException ( e ) ; } }
target:  Creates specific for TTML document transformer.