<?xml version="1.0"?>
<xml>
  <pb_type name="parent">
    <input name="i0"/>
    <input name="i1"/>
    <output name="o"/>
    <pb_type name="child">
      <input name="i"/>
      <output name="o"/>
    </pb_type>
    <interconnect>
      <direct name="parent-o" output="parent.o" input="child.o"/>
      <mux input="parent.i0 parent.i1" output="child.i" name="mux1">
        <metadata>
          <meta name="fasm_mux">
                parent.i0 : a1
                parent.i1 : b1
            </meta>
          <meta name="fasm_name">fasm_name</meta>
        </metadata>
      </mux>
    </interconnect>
  </pb_type>
</xml>