question: public TagTransformation ( String sourceTag , String destTag , boolean preserveSourceAttributes ) { this . sourceTag = sourceTag . toLowerCase ( ) ; if ( destTag == null ) { this . destTag = null ; } else { this . destTag = Utils . isValidXmlIdentifier ( destTag ) ? destTag . toLowerCase ( ) : sourceTag ; } this . preserveSourceAttributes = preserveSourceAttributes ; }
target:  Creates new tag transformation from source tag to target tag specifying whether source tag attributes are preserved.