The main introduction to filter notation doesn't explicitly say that nesting isn't allowed, but it may imply that it is allowed:
https://tiddlywiki.com/#Introduction%20to%20filter%20notation The most hardcore documentation on this is the filter syntax railroad diagrams: https://tiddlywiki.com/#Filter%20Expression:%5B%5BFilter%20Syntax%5D%5D%20%5B%5BFilter%20Expression%5D%5D%20%5B%5BFilter%20Run%5D%5D%20%5B%5BFilter%20Step%5D%5D%20%5B%5BFilter%20Parameter%5D%5D%20%5B%5BFilter%20Whitespace%5D%5D Best wishes Jeremy -- Jeremy Ruston [email protected] https://jermolene.com > On 3 Mar 2019, at 14:08, David Nebauer <[email protected]> wrote: > > Thanks, Jeremy, for providing that solution, and so quickly. It solved my > problem. > > I thought I looked through all the relevant TW documentation when I was > troubleshooting, but I missed the bit about not being able to combine the > effects of the [, { and < brackets in filters. For future reference, where is > that documented? > > Regards, > David. > >> On Sunday, 3 March 2019 22:11:08 UTC+9:30, Jeremy Ruston wrote: >> >> In filters you can’t combine the effect of the [, { and < brackets. Instead >> you’d have to extract the field value as a separate operation. > > -- > 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/0315c69e-58c4-4a70-bcc0-5baf85210f24%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- 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/587E8701-50D3-42FB-A779-D7901DAD8286%40gmail.com. For more options, visit https://groups.google.com/d/optout.

