Subject: deleting temporary annotations

Hi all,

When developing rules, i often use temporary annotations. For example, to
create an anchor, another rule will rely upon. Is there any quick way to
delete such temporary annotations (form the document) when the annotation
process has concluded? For the time being, I delete them individually with
an UNMARK statement, like this:

leftBoundary {-> UNMARK(leftBoundary)};
If such a shortcut does not yet exist, what do you think about extending
DECLARE statement to include an indication of such tempoary nature of the
type, a la

DECLARE leftBoundary as local;
Opinions? Ideas?

Best regards,