<?xml version="1.0"?>
<xs:schema targetNamespace="http://disqus.com"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:dsq="http://disqus.com/disqus-internals"
           xmlns="http://disqus.com"
           elementFormDefault="qualified"
>
  <!-- import the dsq namespace -->
  <xs:import namespace="http://disqus.com/disqus-internals"
             schemaLocation="internals.xsd"/>
  
  <!-- misc types -->
  <xs:simpleType name="identifier">
    <xs:restriction base="xs:string">
      <xs:maxLength value="200"/>
    </xs:restriction>
  </xs:simpleType>

  <!-- root disqus element -->
  <xs:element name="disqus">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="category" type="category" minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="thread" type="thread" minOccurs="0" maxOccurs="unbounded"/>
        <xs:element name="post" type="post" minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <!-- category element -->
  <xs:complexType name="category">
    <xs:all minOccurs="0">
      <xs:element name="forum" type="xs:string"/>
      <xs:element name="title" type="xs:string"/>
      <xs:element name="order" type="xs:integer" minOccurs="0"/>
      <xs:element name="isDefault" type="xs:boolean" default="false" minOccurs="0"/>
    </xs:all>
    <xs:attribute ref="dsq:id"/>
  </xs:complexType>
  
  <!-- thread element -->
  <xs:complexType name="thread">
    <xs:all minOccurs="0">
      <xs:element name="id" type="identifier" minOccurs="0">
        <xs:unique name="threadID">
          <xs:selector xpath="thread"/>
          <xs:field xpath="@id"/>
        </xs:unique>
      </xs:element>
      <xs:element name="forum" type="xs:string"/>
      <xs:element name="category">
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:string">
              <xs:attribute ref="dsq:id"/>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="link" type="xs:anyURI"/>
      <xs:element name="title" type="xs:string"/>
      <xs:element name="message" type="xs:string" minOccurs="0"/>
      <xs:element name="ipAddress" type="xs:string" minOccurs="0"/>
      <xs:element name="author" type="author" minOccurs="0"/>
      <xs:element name="createdAt" type="xs:dateTime"/>
      <xs:element name="isClosed" type="xs:boolean" default="false" minOccurs="0"/>
      <xs:element name="isDeleted" type="xs:boolean" default="false" minOccurs="0"/>
    </xs:all>
    <xs:attribute ref="dsq:id"/>
  </xs:complexType>
  
  <!-- post element -->
  <xs:complexType name="post">
    <xs:all minOccurs="0">
      <xs:element name="id" type="identifier" minOccurs="0">
        <xs:unique name="postID">
          <xs:selector xpath="post"/>
          <xs:field xpath="@id"/>
        </xs:unique>
      </xs:element>
      <xs:element name="parent" minOccurs="0">
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="identifier">
              <xs:attribute ref="dsq:id"/>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="thread">
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="identifier">
              <xs:attribute ref="dsq:id"/>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="author" type="author" minOccurs="0"/>
      <xs:element name="message" type="xs:string"/>
      <xs:element name="ipAddress" type="xs:string" minOccurs="0"/>
      <xs:element name="createdAt" type="xs:dateTime"/>

      <!-- post boolean states states -->
      <xs:element name="isDeleted" type="xs:boolean" default="false" minOccurs="0"/>
      <xs:element name="isApproved" type="xs:boolean" default="true" minOccurs="0"/>
      <xs:element name="isFlagged" type="xs:boolean" default="false" minOccurs="0"/>
      <xs:element name="isSpam" type="xs:boolean" default="false" minOccurs="0"/>
      <xs:element name="isHighlighted" type="xs:boolean" default="false" minOccurs="0"/>
    </xs:all>
    <xs:attribute ref="dsq:id"/>
  </xs:complexType>

  <!-- author element -->
  <xs:complexType name="author">
    <xs:all minOccurs="0">
      <xs:element name="name" type="xs:string"/>
      <xs:element name="email" type="xs:string" minOccurs="0"/>
      <xs:element name="link" type="xs:anyURI" minOccurs="0"/>
      <xs:element name="username" type="xs:string" minOccurs="0"/>
      <xs:element name="isAnonymous" type="xs:boolean" default="true" minOccurs="0"/>
    </xs:all>
    <xs:attribute ref="dsq:id"/>
  </xs:complexType>
</xs:schema>
