Ah, I see now. (I think.) I wasn't recognizing the value of $tags as a filter expression. Viewed in that light, the *+* makes a little more sense.
Though it does prep my brain to expect that any string passed in there *without* the *+* would overwrite the existing tags entirely. I.e., if $tags="+[prefix[$:/]] MyNew Tags" works like $field="tags" filter="[list[!!tags]] +[prefix[$:/]] MyNew Tags", then why doesn't MyNew (without a *+*) clear the field and reset its value to MyNew *only* (with Tags following up and doing the same, leaving Tags the sole tag on the tiddler)? I know it doesn't work this way, but I'd expect all the individual tag values (if they're subfilters) to require the *+*. I probably just need to sit and contemplate your examples a while until it sinks in. Thanks again for breaking <$action-listops> down for me and being so patient as I try to charge through it like a bull in a china shop. -- 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 tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/96dd22b4-1ea1-4fbc-8c7c-d247f0359908%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
