This is my understanding: $i_am_a_macro_parameter$ - replaced upon macro execution
$(i_am_a_variable)$ - replaced upon macro execution <<i_am_a_variable_or_macro>> - executed... I don't exactly know when -- 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 http://groups.google.com/group/tiddlywiki. For more options, visit https://groups.google.com/d/optout.