function annotation_append($content)
{
$append = '';
if (!empty($content->start_seconds) || !empty($content->end_seconds)) {
$append = '#t=npt:' . $content->start_seconds . ',' . $content->end_seconds;
} elseif (!empty($content->start_line_num) || !empty($content->end_line_num)) {
$append = '#line=' . $content->start_line_num . ',' . $content->end_line_num;
} elseif (!empty($content->points)) {
$append = '#xywh=' . $content->points;
} elseif (!empty($content->datetime)) {
$append = '#datetime=' . rdf_timestamp($content->datetime);
if (!empty($content->paragraph_num)) {
$append .= '¶graph=' . $content->paragraph_num;
}
} elseif (isset($content->sort_number)) {
if (!empty($content->sort_number) || !empty($content->relationship) || isset($content->list_in_index)) {
$append = '#index=' . $content->sort_number;
if (!empty($content->relationship)) {
$append .= '&role=' . $content->relationship;
}
if (isset($content->list_in_index)) {
$append .= '&listed=' . $content->list_in_index;
}
}
}
return $append;
}
private function _annotation_category_by_ref(&$return, $version, $settings)
{
// E.g., "review", "commentary"
$CI =& get_instance();
if ('object' != gettype($CI->pages)) {
$CI->load->model('page_model', 'pages');
}
if ('object' != gettype($CI->annotations)) {
$CI->load->model('annotation_model', 'annotations');
}
$annotation = new stdClass();
$version->datatime = $version->created;
$annotation->has_body = $version->version_of . '.' . $version->version_num;
$annotation->has_target = rtrim($settings['base_uri'], '/') . '#datetime=' . rdf_timestamp($version->created) . '&type=' . $version->category;
// The book
$return[$CI->pages->category_urn($version->category, $version->version_id)] = $CI->annotations->rdf($annotation);
}
/**
* Covert values to specific RDF values
*/
public function dcterms_created($value)
{
return rdf_timestamp($value);
}
