lvjr

The most important thing is how to clear existing values of keys in `tabularray`: https://github.com/lvjr/tabularray/wiki/KeyValue But I haven't checked all the keys yet.

This needs to be fixed in `siunitx`, since we must not patch private macros in `siunitx`.

@josephwright How about checking `\g_tblr_level_int` (a public integer for the nesting level of `tabularray` tables)?

> > Would checking nesting level (`\g_tblr_level_int`) fail in rare cases, for example when an `array` using `S` column is nested in `tblr`? Maybe need some words in doc. >...

> That's why I was asking about a marker - I wondered if there was flag that was on in a cell but turned off for nested tabulars - I...

> Alternatively, `siunitx` can provide a new option that the `si` column type will always set. After reading again your workaround code above, I believe this is the most reliable...

Anyone can write a new package for this feature. But I need to keep `tabularray` minimal.

@dbitouze You can use `\DeclareTblrKeys` like this: ```tex \documentclass{article} \usepackage{tabularray} \usepackage{ninecolors} \DeclareTblrKeys{table/inner}{ toprule .meta:n = { hline{#1} = {wd = 2pt, fg=purple3} }, bottomrule .meta:n = { hline{#1} = {wd...

It is a strange bug: when I pass outer option `long` to make it a long table, no error occurs: ```latex \documentclass{article} \usepackage{tabularray} \UseTblrLibrary{varwidth} \begin{document} % set "measure=vbox" as default...

> By default `\SetTblrInner` only influence tblr environment. What's needed here is > > ``` > \SetTblrInner[tblr,longtblr]{measure=vbox} > ``` > Also see package doc (2023A (2023-03-01)), sec. 3.3 Default Specifications:...