<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://www.gexf.net/1.1draft" xmlns:ns1="http://www.gexf.net/1.1draft">
  <xs:import schemaLocation="viz.xsd"/>
  <!-- extension point -->
  <!-- new point -->
  <xs:complexType name="parents-content">
    <xs:sequence>
      <xs:element minOccurs="0" maxOccurs="unbounded" ref="ns1:parent"/>
    </xs:sequence>
  </xs:complexType>
  <xs:element name="parent">
    <xs:complexType>
      <xs:attributeGroup ref="ns1:parent-content"/>
    </xs:complexType>
  </xs:element>
  <!-- new point -->
  <xs:attributeGroup name="parent-content">
    <xs:attribute name="for" use="required" type="ns1:id-type"/>
  </xs:attributeGroup>
</xs:schema>