Guile-hoot/examples/project-template/hello/document.scm

(library (hello document)
  (export document-body
          make-text-node)
  (import (scheme base)
          (hoot ffi))

  (define-foreign document-body
    "document" "body"
    -> (ref null extern))
  (define-foreign make-text-node
    "document" "createTextNode"
    (ref string) -> (ref null extern)))