Mohammad, the explanation by BurningTreeC is the really the key to understanding the issue here.
the *all* operator creates an output, ignores every input. the *is* > operator filters an input > I guess the first : <$list filter="01 02 03"> : is just setting the <<currentTiddler>> variable. The *all* operator can use that, the *is* operator ignores it? I believe this difference between "creating an output" and "filtering an input" deserves to be clarified the documentation, and I may do that. Also, Mark said: The "is" operator has the advantage that it can take a "system" parameter, > which is for some reason is missing from "all". > As a general question, would it not be a good idea to include a fundamental category of *system* in the *all* operator? -- 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 post to this group, send email to [email protected]. 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/1edff340-c9cd-400f-bb4d-384ad825804d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

