A bit like {{#target}} does in MassMessage?
Examples
images that couldn't be fetched (HTTP errors etc.) images that have a non-free license images that have an unknown license (with link to upcoming license information page)
from http://web.archive.org/web/20111002214301/http://code.pediapress.com/wiki/ticket/596
Those could all be tracking categories, for instance.
Version: unspecified
Severity: enhancement