I've nearly done the job I wanted. in my macro tiddler I wrote:
\whitespace trim \define wcagDir() <$transclude tiddler="$:/user/dict/wcag/ref/cat" index="$(codeFam)$"/> \define wcag(ref) <$set name="base" value="https://www.w3.org/WAI/WCAG21/Techniques";> <$set name="codeFam" filter="$ref$ +[splitregexp[\d+]] +[join[]]"> ref: $ref$ base: <<base>> codeFam: <<codeFam>> dir: <<wcagDir>> <$set name="url" filter="[<base>] [<wcagDir>] $ref$ +[join[/]]"> a href=<<url>> target="w3.org/WAI/" LABEL $ref$ </$set> </$set> </$set> \end.png and in my user tiddler I wrote: * H18 in wcag: <<wcag H18>> and thisproduces that: H18 in wcag: ref: H18 base: https://www.w3.org/WAI/WCAG21/Techniques codeFam: H dir: html a href=https://www.w3.org/WAI/WCAG21/Techniques/<$transclude tiddler="$:/user/dict/wcag/ref/cat" index="H"/>/H18 target="w3.org/WAI/" LABEL H18 Why the difference for the wcagDir macro calls? I tried playing with the wikify widget but it does not what I wanted (I thought that I need the output of wcagDir be interpreted as wiki text). If I put [{/user/dict/wcag/ref/cat##H}] instead of the transclude widget, it is OK, but I must use a variable and not H, and this I cannot do, and so I thought that the transclude widget would save me. [image: wcag-macro.png] Le mardi 29 septembre 2020 à 11:07:18 UTC+2, Jean-Pierre Rivière a écrit : > Thank you vet much ineed Eric! I already read that abbreviated form stuff, > but it did not got me right on this. Actually, I think the shorter syntax > is really difficult into apprehending the filters. For me anyway. > > When you read in the schema that a run should obey "one [, then neither [ > nor ] then ]" it's a bit difficult to see that a run can be [[helloThere]] > because it is the abbreviated form of [title[helloThere]]. I mean, when > you'rte out of idea of what was wrong, the documentation is a mixed > blessing as it currently is. This form is not bad in itself but it is hard > on the newbye. I'd like to have a try at providing further help for the > newbye, but I just cannot yet, because I'm just struiggling to get things > done. > > Abot getting things done, the error message I get most often is "Missing [ > in filter expression" which is not very helpful. This is the case, for > instance, in the following macro definition: > > <$set name="codeFamily" filter="[[title[$ref$]] +join[]]"> > > There are the same numbers of [ and ] and each [ do precede its > corresponfing ]]. Is there an helper tool available to check syntax > problems and report them in a more useful way? (and I don't see the syntax > problem in my example, although this is just an example, as the code I > wanted was filter=[[$refs$]+join[]]" but it is not working as expected > either but I'm working on it and it's not my question here). > > > Le lundi 28 septembre 2020 à 19:03:22 UTC+2, Eric Shulman a écrit : > >> On Monday, September 28, 2020 at 9:48:20 AM UTC-7, Jean-Pierre Rivière >> wrote: >>> >>> @Eric >>> I don't understand the [[/$tref$]] construct inside a filter. From the >>> doc, I see that [...] is a filter run. A filter run is made of step and >>> each step is essentially a parameter eventually preceded by ! and/or an >>> operator (with eventual : suffixes). No suare breacket within a step. I >>> heve not read that a run can directly contain a run. So I cannot understand >>> how [[/$ref]] may occur within a filter. I4m also finding strange a step >>> without operator but with an operand (parameter) and the text seems to be >>> ofg the same advice but as far as I read the railroad schema, this may very >>> well happen (no idea of an example for me). >>> >>> I don't say you're wrong, I'm just saying I don't see how I could have >>> understood that from the official documentation. >>> >> >> This is explained in https://tiddlywiki.com/#Filter%20Step >> >> The step's operator is drawn from a list of predefined keywords >>> <https://tiddlywiki.com/#Filter%20Operators>, which can be extended by >>> plugins. >>> Any unrecognised operator is treated as if it was the suffix to the >>> field <https://tiddlywiki.com/#field%20Operator> operator. >>> If a step's operator is omitted altogether, it defaults to title. >> >> >> Thus, [[text here]] *is* a filter run containing one filter step that is >> equivalent to [title[text here]]. >> Note that you can also specify a filter run that defines literal text >> values by using quotes, >> as described in https://tiddlywiki.com/#Filter%20Run >> >> The lower three options in the diagram match syntax like HelloThere, >>> "HelloThere", 'HelloThere' and "Filter Operators". >>> >> They are short for [title[...]]. >>> >>> The quoted options exist to support titles that contain square brackets, >>> as in "An [[[[Unusual]]]] Tiddler". >>> >> >> -e >> > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. 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