<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://purl.oclc.org/dsdl/schematron">
<ns uri="http://www.inkscape.org/namespace/inkscape/extension" prefix="inx"/>
  <pattern>
    <title>duplicateOptionValues</title>
    <rule context="//inx:param/inx:option">
      <report test="preceding-sibling::inx:option/@value = @value">Warning: @value values should be unique for a given option.</report>
    </rule>
  </pattern>
</schema>
