Synopsis

<p:declare-step type="pxf:tail" xmlns:pxf="http://exproc.org/proposed/steps/file">
     <p:output port="result"/>
     <p:option name="href" required="true"/>                       <!-- anyURI -->
     <p:option name="count" required="true"/>                      <!-- int -->
     <p:option name="fail-on-error" select="'true'"/>              <!-- boolean -->
</p:declare-step>