MichaelJCompton commented :
Yep fragments would work, but you’d need to add them into your query client-side. The issue is asking for being able to store those server-side so there’s no need to send on each request.
As a work around, yes, you can definitely have fragments that you include in your queries client side.
This does also interact with GraphQL though, because it would be neat to be able to define a GraphQL± ‘stored procedure’/fragment and then use that as the definition of of a GraphQL field/query.