7.7 legacyInterop Category

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema 
    targetNamespace="http://schemas.microsoft.com/2006/09/sip/categories"
    xmlns:tns="http://schemas.microsoft.com/2006/09/sip/categories"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    elementFormDefault="qualified"
    attributeFormDefault="unqualified">
 
  <xs:complexType name="legacyInteropType">
    <xs:attribute name="availability" type="xs:unsignedInt"/>
    <xs:attribute name="token" type="xs:token"/>
    <xs:attribute name="dndState" type="xs:boolean"/>
    <xs:anyAttribute processContents="lax"/>
  </xs:complexType> 
  <xs:element name="legacyInterop" type="tns:legacyInteropType"/>
</xs:schema>