<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="xri://$xrds"
           elementFormDefault="qualified"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:xrds="xri://$xrds">

  <!-- Utility patterns -->
  <xs:attributeGroup name="otherattribute">
    <xs:anyAttribute namespace="##other" processContents="lax"/>
  </xs:attributeGroup>
  <xs:group name="otherelement">
    <xs:choice>
      <xs:any namespace="##other" processContents="lax"/>
      <xs:any namespace="##local" processContents="lax"/>
    </xs:choice>
  </xs:group>

  <!-- Patterns for elements -->
  <xs:element name="XRDS">
    <xs:complexType>
      <xs:sequence>
        <xs:group ref="xrds:otherelement" minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attributeGroup ref="xrds:otherattribute"/>
    </xs:complexType>
  </xs:element>
</xs:schema>