Synopsis

<p:declare-step type="p:pack">
     <p:input port="source" sequence="true" primary="true"/>
     <p:input port="alternate" sequence="true"/>
     <p:output port="result" sequence="true"/>
     <p:option name="wrapper" required="true"/>                    <!-- QName -->
     <p:option name="wrapper-prefix"/>                             <!-- NCName -->
     <p:option name="wrapper-namespace"/>                          <!-- anyURI -->
</p:declare-step>