TonyM, Although a newly created tiddler has a tags field, it is just empty. The negated "has" means "those input tiddlers in which field F does not exist or has an empty value", exactly this is what I need because I want to know if a tiddler has tags or not (something is written in the tags field in addition to the tiddler having such a field). The current behaviour of "!has[tags]" is a programming error that needs to be fixed and I will do it later.
If you create an empty tiddler and try the filter you mentioned with it, you will also get an incorrect result because the "tags" field of the tiddler is empty, yet it will appear in the output of the filter. [[New Tiddler]has:field[tags]] -- 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 view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/6a762075-dee6-4e83-be97-7581fb28e190%40googlegroups.com.
