Hi Cade, you are understanding the mathematical "idea" of intersection correct BUT you are telling TW to throw away everyting that your first run outputted when you are using filter-operators that throw away the input (stated as "input ignored" in the filter operator) in subsequent runs, as *[A]* and *[C]* do. See also: https://tiddlywiki.com/#title%20Operator.
What you actually get is everything that lists *C* in your first <$list> and *A* in your second. Regards, Mirko Am Samstag, 26. September 2020 17:56:02 UTC+2 schrieb Cade Roux: > > Thanks, I have started using a field and I am struggling with list > intersections, i.e. lists of items that are tagged both A and C: > > I thought these would be the intersection and should be equivalent: > > <$list filter="[[A]listed[my.field]] +[[C]listed[my.field]]" /> > <$list filter="[[C]listed[my.field]] +[[A]listed[my.field]]" /> > > But not only are they not equivalent, they are not correct lists: > > [image: Screenshot 2020-09-26 105510.png] > > What am I not understanding correctly about the filter intersections? > > Thanks, > > Cade > > On Saturday, September 26, 2020 at 1:03:00 AM UTC-5 TW Tones wrote: > >> Cade, >> >> As far as I know Gentags is the state of the art for a plugin giving you >> alternative tag fields. >> >> Just keep in mind tags are a solution built into the core. >> >> - I for one avoid them to keep them free for ad hoc tagging. >> - Instead I tend to use my own fields and list fields that in many >> ways work not unlike tags if you want them to. >> - See listops and other operators and widgets. >> - Avoid the use of prefixes on titles, including tag names where >> practical otherwise you will find you need to parse the title to extract >> info. >> >> >> For a small or for purpose wiki do what you want with the tags and >> prefixed titles, its only when you transfer tiddlers or grow wikis it may >> become a problem. >> >> Regards >> Tony >> >> On Saturday, 26 September 2020 04:48:59 UTC+10, Cade Roux wrote: >>> >>> I find myself looking to use this concept in my data mart data >>> dictionary/user manual, as I want to have three types of tags for one set >>> of generated tiddlers and three types of tags for another set of generated >>> tiddlers and putting a prefix on each set and throwing them into tags field >>> is kind of unwieldy and the filters will be really awkward. >>> >>> Is https://ooktech.com/jed/ExampleWikis/GenericTagFields/ this the >>> latest thinking on that or is there another plugin I should be looking at >>> (or something that has made it to core? >>> >>> Thanks, >>> >>> Cade >>> >> -- 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/ea85fe20-e200-49eb-b729-ee7ad4724129o%40googlegroups.com.
