$ cedarbridge document --file invalid.cbs --language 'xhtml'
ERROR: invalid.cbs:3:1: Name "T" has already been defined.
  Specification: https://www.io7m.com/software/cedarbridge/specification/index.xhtml#id_1cf38aec-7544-4b5e-a5ac-bb01567ffe77
(record T))
^
  See invalid.cbs:2:1:
(record T))
^

$ cedarbridge document --file valid.cbs --language 'xhtml'
