467 	  return $this->_xmlEntities($heading);
470       return $this->_xmlEntities($default);
472       return $this->_xmlEntities($title);
479   function _xmlEntities($string) {  function in syntax_plugin_bibtex
514 	$ret .= ' title="'.$this->_xmlEntities($title).'"';
515 	$ret .= ' alt="'.$this->_xmlEntities($title).'"';
522 	  $ret .= ' title="'.$this->_xmlEntities($cap).'"';
523 	  $ret .= ' alt="'.$this->_xmlEntities($cap).'"';
530 	$ret .= ' width="'.$this->_xmlEntities($width).'"';
533 	$ret .= ' height="'.$this->_xmlEntities($height).'"';
540       if ( !is_null($width) ) $ret .= ' width="'.$this->_xmlEntities($width).'"';
541       if ( !is_null($height) ) $ret .= ' height="'.$this->_xmlEntities($height).'"';
547       if ( !is_null($width) ) $ret .= ' width="'.$this->_xmlEntities($width).'"';
548       if ( !is_null($height) ) $ret .= ' height="'.$this->_xmlEntities($height).'"';
555       $ret .= $this->_xmlEntities($title);
558       $ret .= $this->_xmlEntities(noNS($src));