POSTNET

The configuration for the default implementation is:

<barcode>
  <postnet>
      <height>{length:15mm}</height>
      <module-width>{length:0.02in}</module-width>
      <quiet-zone enabled="{boolean:true}">{length:10mw}</quiet-zone>
      <checksum>{checksum-mode:auto=ignore}</checksum>
      <interchar-gap-width>{length:0.026in}</interchar-gap-width>
      <tall-bar-height>{length:0.125in}</tall-bar-height>
      <short-bar-height>{length:0.050in}</short-bar-height>
      <baseline-alignment>{baseline-alignment:bottom}</baseline-alignment>
      <human-readable>
        <placement>{human-readable-placement:none}</placement>
        <font-name>{font-name:Helvetica}</font-name>
        <font-size>{length:8pt}</font-size>
        <display-checksum>{boolean:false}</display-checksum>
      </human-readable>
  </postnet>
</barcode>

• Valid characters are 0-9
• display-checksum controls whether the calculated checksum should be included in the human-readable part.