cast-content-type 008 (AB)

The pipeline

<p:declare-step xmlns:c="http://www.w3.org/ns/xproc-step" xmlns:err="http://www.w3.org/ns/xproc-error" xmlns:p="http://www.w3.org/ns/xproc" name="pipeline" version="3.0">
   <p:output port="result"/>
   <p:cast-content-type content-type="application/octet-stream">
      <p:with-input>
         <c:data content-type="application/octet-stream">I am no base64.</c:data>
      </p:with-input>
   </p:cast-content-type>
</p:declare-step>