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I'm unable to get the Field Filter in the FHIR GraphQL spec to work on extensions.

 { 
  myext: extension(url: "http://myextension.url/details") { value : valueString } 
 }

Should this work as specified here? https://hl7.org/fhir/graphql.html#:~:text=One%20way%20this%20can%20be%20used%20is%20to%20select%20particular%20extensions%3A

Hi <@880200155981316177>  - the Medplum GraphQL implementation currently does not support "Field Arguments".  I just filed an issue to track: https://github.com/medplum/medplum/issues/1895

Great, thank you. Is there any way to query for a certain extension yet?

https://www.medplum.com/docs/search/graphql#filtering-lists-with-field-arguments

Hi <@880200155981316177>  - yes, we released list args today.  The docs include an example of filtering extensions by url.  Let us know if there's anything else we can do to help