No. It seems it isn't working.
It's doing as it should with [rowid] or if [abc] is a URL param.
But not if it's an element, although the query in fabrikdebug is always identical.
To force documentsheaders___Guid to be a URL param you can add a custom edit and view link to your list, somthing like (Edit link, set your form/list/Itemid...)
index.php?option=com_fabrik&view=form&Itemid=111&formid=1&listid=1&lang=de&docparam={documentsheaders___Guid}
and in the content plugin
documentsbodys___DocumentGuid =[docparam]
This seems to do, no idea if there's a better solution.
Access levels:
I always add a Joomla access level "nobody", assigned to no Jooomla group.
