Can't you just $setfield? The following probably has the wrong syntax but it's just to illustrate the strategy:
\define setlist(tag) <$button> <$set name=tids filter="""[tag[$tag$]]"""> <$action-setfield $tiddler="""$tag$""" list=<<tids>>/> </$set> </$button> \end (Hm, surely you know this already,Tony?) <:-) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/d6ed1539-173d-4739-b44b-7bc99427c52f%40googlegroups.com.
