Replacing \smallcaps with \sc fixed it. I had assumed they were synonyms---the same as \bf vs \boldface, \it vs \italicface, but it seems they are different entirely?
Thanks!
--Joel

    On Sunday, April 24, 2022, 11:19:10 AM MDT, Henning Hraban Ramm via ntg-context <ntg-context@ntg.nl> wrote:  
 
 Am 24.04.22 um 16:21 schrieb Joel via ntg-context:
> I have a font that already comes with a smallcaps variant.
> 
> How do I define it?
> 
> I've tried the following, which I think should work from the 
> documentation I've seen, but doesn't:
> 
> 
> \starttypescript[serif]                            [garamond]
>      \definefontsynonym[Serif]                  
>   [file:/home/joel/.fonts/12/EBGaramond-Regular.otf]
>      \definefontsynonym[SerifBold]              
>   [file:/home/joel/.fonts/12/EBGaramond-Bold.otf]
>      \definefontsynonym[SerifItalic]              
>   [file:/home/joel/.fonts/12/EBGaramond-Italic.otf]
>      \definefontsynonym[SerifBoldItalic]          
>   [file:/home/joel/.fonts/12/EBGaramond-BoldItalic.otf]
>      \definefontsynonym[SerifCaps]              
>   [file:/home/joel/.fonts/13/EBGaramond12-AllSC.otf]
> \stoptypescript
> 
> \starttypescript[sans]                            [garamond]
>      \definefontsynonym[Sans]                  
>   [file:/home/joel/.fonts/12/EBGaramond-Regular.otf]
>      \definefontsynonym[SansBold]              
>   [file:/home/joel/.fonts/12/EBGaramond-Bold.otf]
>      \definefontsynonym[SansItalic]              
>   [file:/home/joel/.fonts/12/EBGaramond-Italic.otf]
>      \definefontsynonym[SansBoldItalic]          
>   [file:/home/joel/.fonts/12/EBGaramond-BoldItalic.otf]
>      \definefontsynonym[SansCaps]              
>   [file:/home/joel/.fonts/13/EBGaramond12-AllSC.otf]
> \stoptypescript
> 
> \starttypescript[garamond]
>      \definetypeface[garamond]                  
>   [rm][serif][garamond][default]
>      \definetypeface[garamond]                  
>   [ss][sans][garamond][default]
>      \definetypeface[garamond]                  
>   [mm][math][modern][default]
> \stoptypescript
> 
> \starttext
> 
>      This is regular text.
> 
>      {\smallcaps This should be in smallcaps.}
> 
>      {\WORD This should be regular text, but capitalized, not really 
> smallcaps.}
> 
> \stoptext

SerifCaps etc. works with the traditional \sc, don’t know about \smallcaps.

Are you sure your fonts are found?

mtxrun --script fonts --list --all --pattern=EBGaramond


If your regular OpenType font contains smallcaps, try:

\definefontfeature[mysmallcaps][default][
  smcp=yes, % smallcaps
  script=latn,
]

\starttypescript [serif] [garamond] [name]
...
\definefontsynonym [SerifCaps][EBGaramond-Regular][features=mysmallcaps]
...


Hraban
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