hi evan

thanks for the quick reply. 

My problem was that annotations that i coded myself only were visible to the user that posted this comment. That was due to some access restrictions in the function mentioned above. here's my new function:

function get_annotation($annotation_id) {

global $CONFIG;

$annotation_id = (int) $annotation_id;

$access = get_access_sql_suffix("a");

        // EDIT: removed :  "and $access" -> display annotation for everybody!

return row_to_elggannotation(get_data_row("SELECT a.*, n.string as name, v.string as value from {$CONFIG->dbprefix}annotations a JOIN {$CONFIG->dbprefix}metastrings n on a.name_id = n.id JOIN {$CONFIG->dbprefix}metastrings v on a.value_id = v.id where a.id=$annotation_id"));

}

for my own comment, here's some of the code i used:

$annotation_id = $obj->annotate("comment", $comment, $vartype='text');
add_to_river('river/comment', 'comment', $user_guid, $object_guid, '',$time, $annotation_id);

the problem was in myplugin/views/river/comment (copied from other plugins)

//grab the annotation, if one exists
if ($vars['item']->annotation_id != 0) {
     $comment = get_annotation($vars['item']->annotation_id)->value;
}

as mentioned above: due to access restriction only the annotation owned by $_SESSION['user'] are displayed.

Do you have any advise how to accomplish that without changing the core?

Create the annotation with public access. See create_annotation().

cool, that's what I was looking for!

thanks a lot!