cx:uri-info

<p:declare-step xmlns:p="http://www.w3.org/ns/xproc"
                xmlns:cx="http://xmlcalabash.com/ns/extensions"
                type="cx:uri-info">
  <p:output port="result"/>
  <p:option name="href" required="true"
            cx:type="xsd:anyURI"/>
  <p:option name="username"/>
  <p:option name="password"/>
  <p:option name="auth-method"/>
  <p:option name="send-authorization"/>
</p:declare-step>