Thank you very much, bimlas
I too concur with Mohammad, very clever and handy! :-)
Your solution was tested on wikis between 800 - 4K tiddlers and saw no performance degradation from viewing the extra tiddlers.
Oft times I drag in a lot of content to 'bookmark' in TiddlyWiki but accrue semantic debt when I lag in tagging at import time.
Between tagging, other methods like Tobias Beer's Sidebar Stories
and now your useful template, this really helps make/find meaning in TiddlyWiki without manual metadata intervention.