conf.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="config" type="configType"/>
  <xs:complexType name="authenticationType">
    <xs:sequence>
      <xs:element name="method" maxOccurs="unbounded" minOccurs="0">
        <xs:simpleType>
          <xs:restriction base="xs:token">
            <xs:enumeration value="digest"/>
            <xs:enumeration value="basic"/>
          </xs:restriction>
        </xs:simpleType>
      </xs:element>
      <xs:element type="xs:normalizedString" name="realm"/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="generalType">
    <xs:all>
      <xs:element type="xs:token" name="logfile" minOccurs="0"/>
      <xs:element type="xs:byte" name="loglevel" minOccurs="0"/>
      <xs:element type="xs:boolean" name="dryrun" minOccurs="0"/>
      <xs:element type="authenticationType" name="authentication" minOccurs="0"/>
    </xs:all>
  </xs:complexType>
  <xs:complexType name="userType">
    <xs:sequence>
      <xs:element type="hostnameType" name="hostname" maxOccurs="unbounded" minOccurs="0"/>
    </xs:sequence>
    <xs:attribute type="xs:token" name="name" use="required"/>
    <xs:attribute type="xs:token" name="password" use="optional"/>
  </xs:complexType>
  <xs:complexType name="usersType">
    <xs:sequence>
      <xs:element type="userType" name="user" maxOccurs="unbounded" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="tokenWithAttributes">
  	<xs:simpleContent>
  		<xs:extension base="xs:token">
  			<xs:anyAttribute processContents="skip" />
  		</xs:extension>
	</xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="zoneType">
    <xs:sequence>
     <xs:element type="tokenWithAttributes" name="updater" minOccurs="0" />
      <xs:element type="xs:token" name="keyfile"/>
      <xs:element type="xs:token" name="nameserver"/>
      <xs:element type="xs:positiveInteger" name="ttl"/>
      <xs:element type="xs:boolean" name="dryrun"/>
    </xs:sequence>
    <xs:attribute type="xs:token" name="name" use="required"/>
  </xs:complexType>
  <xs:complexType name="zonesType">
    <xs:sequence>
      <xs:element type="zoneType" name="zone" maxOccurs="unbounded" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="configType">
    <xs:all>
      <xs:element type="generalType" name="general" minOccurs="1"/>
      <xs:element type="usersType" name="users" minOccurs="0"/>
      <xs:element type="zonesType" name="zones" minOccurs="1"/>
    </xs:all>
  </xs:complexType>
  <xs:simpleType name="hostnameType">
	<xs:restriction base="xs:token">
	  <xs:pattern value="(\*\.){0,1}([A-Za-z0-9\-]+\.)*([A-Za-z0-9\-]+)" />
	</xs:restriction>
  </xs:simpleType>
</xs:schema>