function _expandurl($url)
{
$m = array();
if (!preg_match('/^ ([^:]+) (:[:=]) (.+) $/x', $url, $m)) {
return HTML::span(array('class' => 'error'), _("BAD semantic relation link"));
}
$this->_relation = urldecode($m[1]);
$is_attribute = $m[2] == ':=';
if ($is_attribute) {
$this->_attribute = urldecode($m[3]);
// since this stored in the markup cache, we are extra sensible
// not to store false empty stuff.
$units = new Units();
if (!DISABLE_UNITS and !$units->errcode) {
$this->_attribute_base = $units->Definition($this->_attribute);
$this->_unit = $units->baseunit($this->_attribute);
}
} else {
$this->_page = urldecode($m[3]);
}
return $m;
}
