<?xml version="1.0" encoding="UTF-8"?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:include schemaLocation="plot.xsd" />  
    
    <xs:element name="paramPlot" substitutionGroup="PlotElement">
      <xs:complexType>
        <xs:attribute name="id" type="xs:string"/>
      </xs:complexType>
    </xs:element>      
</xs:schema>