Thanks Jeremy, I use the below method and it works, but it is NOT semantic!
\define macro2(param) I'm a macro. Param is <$list filter="[<__param__>minlength[1]]">not</$list> provided \end <<macro2 param:provided>> <<macro2>> --Mohammad -- 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/8eaad54d-6aab-441b-b343-8932a4d7424c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.

