vast4.xsd

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:vast="http://www.iab.com/VAST" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.iab.com/VAST" version="4.0.7">
  <!-- =================== Begin root VAST document structure ============= -->
  <xs:element name="VAST" >
    <xs:annotation>
      <xs:documentation>IAB VAST (Video Ad Serving Template), Version 4.0</xs:documentation>
    </xs:annotation>
    <xs:complexType>
      <xs:choice>
        <xs:element name="Ad" minOccurs="0" maxOccurs="unbounded" >
          <xs:annotation>
            <xs:documentation>Top-level element, wraps each ad in the response or ad unit in an ad pod. This MUST be present unless an Error element is present.</xs:documentation>
          </xs:annotation>
          <xs:complexType>
            <xs:choice minOccurs="1" maxOccurs="1">
              <xs:element name="InLine" minOccurs="0" maxOccurs="1" type="vast:Inline_type">
                <xs:annotation>
                  <xs:documentation>Second-level element surrounding complete ad data for a single ad</xs:documentation>
                </xs:annotation>
              </xs:element>
              <xs:element name="Wrapper" minOccurs="0" maxOccurs="1" type="vast:Wrapper_type">
                <xs:annotation>
                  <xs:documentation>Second-level element surrounding wrapper ad pointing to Secondary ad server.</xs:documentation>
                </xs:annotation>
              </xs:element>
            </xs:choice>
            <xs:attribute name="id" type="xs:string" use="optional" />
            <xs:attribute name="sequence" type="xs:integer" use="optional">
              <xs:annotation>
                <xs:documentation>Identifies the sequence of multiple Ads that are part of an Ad Pod.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
            <xs:attribute name="conditionalAd" type="xs:boolean" use="optional">
              <xs:annotation>
                <xs:documentation>A Boolean value that identifies a conditional ad.</xs:documentation>
              </xs:annotation>
            </xs:attribute>
          </xs:complexType>
        </xs:element>
        <xs:element name="Error" minOccurs="0" maxOccurs="unbounded" type="xs:anyURI" >
          <xs:annotation>
            <xs:documentation>Used when there is no ad response. When the ad server does not or cannot return an Ad. If included the video player must send a request to the URI provided (Sec 3.2.1).</xs:documentation>
          </xs:annotation>
        </xs:element>
      </xs:choice>
      <xs:attribute name="version" type="xs:string" use="required">
        <xs:annotation>
          <xs:documentation>Current version is 4.0</xs:documentation>
        </xs:annotation>
      </xs:attribute>
    </xs:complexType>
  </xs:element>
  <!-- =================== End root VAST document structure ============= -->
  <!-- =================  VAST internal type definitions ==================== -->
  <xs:complexType name="IconClickTracking_type">
    <xs:annotation>
      <xs:documentation>URLs to ping when icon action occurs.</xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attribute name="id" type="xs:string" />
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="TrackingEvents_type" >
    <xs:sequence>
      <xs:element name="Tracking" minOccurs="0" maxOccurs="unbounded">
        <xs:annotation>
          <xs:documentation>The name of the event to track for the element. The creativeView should always be requested when present.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="event" use="required">
                <xs:annotation>
                  <xs:documentation>The name of the event to track. For nonlinear ads these events should be recorded on the video within the ad.</xs:documentation>
                </xs:annotation>
                <xs:simpleType>
                  <xs:restriction base="xs:token">
                    <xs:enumeration value="mute" />
                    <xs:enumeration value="unmute" />
                    <xs:enumeration value="pause" />
                    <xs:enumeration value="resume" />
                    <xs:enumeration value="rewind" />
                    <xs:enumeration value="skip" />
                    <xs:enumeration value="playerExpand" />
                    <xs:enumeration value="playerCollapse" />
                    <xs:enumeration value="start" />
                    <xs:enumeration value="firstQuartile" />
                    <xs:enumeration value="midpoint" />
                    <xs:enumeration value="thirdQuartile" />
                    <xs:enumeration value="complete" />
                    <xs:enumeration value="acceptInvitationLinear" />
                    <xs:enumeration value="timeSpentViewing" />
                    <xs:enumeration value="progress" />
                    <xs:enumeration value="creativeView" />
                    <xs:enumeration value="acceptInvitation" />
                    <xs:enumeration value="adExpand" />
                    <xs:enumeration value="adCollapse" />
                    <xs:enumeration value="minimize" />
                    <xs:enumeration value="close" />
                    <xs:enumeration value="overlayViewDuration" />
                    <xs:enumeration value="otherAdInteraction" />
                  </xs:restriction>
                </xs:simpleType>
              </xs:attribute>
              <xs:attribute name="offset" use="optional">
                <xs:annotation>
                  <xs:documentation>The time during the video at which this url should be pinged. Must be present for progress event.</xs:documentation>
                </xs:annotation>
                <xs:simpleType>
                  <xs:restriction base="xs:string">
                    <xs:pattern value="(\d{2}:[0-5]\d:[0-5]\d(\.\d\d\d)?|1?\d?\d(\.?\d)*%)" />
                  </xs:restriction>
                </xs:simpleType>
              </xs:attribute>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="VideoClicks_Base_type" >
    <xs:sequence>
      <xs:element name="ClickTracking" minOccurs="0" maxOccurs="unbounded">
        <xs:annotation>
          <xs:documentation>URL to request for tracking purposes when user clicks on the video.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="id" type="xs:string" use="optional" />
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="CustomClick" minOccurs="0" maxOccurs="unbounded">
        <xs:annotation>
          <xs:documentation>URLs to request on custom events such as hotspotted video.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="id" type="xs:string" use="optional" />
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="VideoClicks_Inline_type" >
    <xs:complexContent>
      <xs:extension base="vast:VideoClicks_Base_type">
        <xs:sequence>
          <xs:element name="ClickThrough" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation>URL to open as destination page when user clicks on the video. This can occur zero to many times. The XSD syntax can't represent that.</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:simpleContent>
                <xs:extension base="xs:anyURI">
                  <xs:attribute name="id" type="xs:string" use="optional" />
                </xs:extension>
              </xs:simpleContent>
            </xs:complexType>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Impression_type" >
    <xs:simpleContent>
      <xs:extension base="xs:anyURI">
        <xs:attribute name="id" type="xs:string" use="optional">
          <xs:annotation>
            <xs:documentation>Ad server ID for the impression</xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="CreativeResource_type">
    <xs:annotation>
      <xs:documentation>A base creative resource type (sec 3.13) for non-video creative content. This specifies static, IFrame, or HTML content, or a combination thereof</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="HTMLResource" minOccurs="0" maxOccurs="unbounded" type="vast:HTMLResource_type">
        <xs:annotation>
          <xs:documentation>HTML to display the companion element. This can occur zero to many times, but order should not be important.</xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name="IFrameResource" minOccurs="0" maxOccurs="unbounded" type="xs:anyURI">
        <xs:annotation>
          <xs:documentation>URI source for an IFrame to display the companion element. This can occur zero to many times, but order should not be important.</xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name="StaticResource" minOccurs="0" maxOccurs="unbounded">
        <xs:annotation>
          <xs:documentation>URI to a static file, such as an image or SWF file. This can occur zero to many times, but order should not be important.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="creativeType" type="xs:string" use="required">
                <xs:annotation>
                  <xs:documentation>MIME type of static resource</xs:documentation>
                </xs:annotation>
              </xs:attribute>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="Icon_type">
    <xs:complexContent>
      <xs:extension base="vast:CreativeResource_type">
        <xs:sequence>
          <xs:element name="IconClicks" minOccurs="0" maxOccurs="1">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="IconClickThrough" minOccurs="0" maxOccurs="1" type="xs:anyURI">
                  <xs:annotation>
                    <xs:documentation>URL to open as destination page when user clicks on the icon.</xs:documentation>
                  </xs:annotation>
                </xs:element>
                <xs:element name="IconClickTracking" minOccurs="0" maxOccurs="unbounded" type="vast:IconClickTracking_type">
                  <xs:annotation>
                    <xs:documentation>URLs to ping when user clicks on the the icon.</xs:documentation>
                  </xs:annotation>
                </xs:element>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="IconViewTracking" minOccurs="0" maxOccurs="unbounded" type="xs:anyURI">
            <xs:annotation>
              <xs:documentation>A URI for the tracking resource file to be called when the icon creative is displayed.</xs:documentation>
            </xs:annotation>
          </xs:element>
        </xs:sequence>
        <xs:attribute name="program" type="xs:string">
          <xs:annotation>
            <xs:documentation>Program represented in the Icon.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="width" type="xs:integer">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of icon.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="height" type="xs:integer">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of icon.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="xPosition">
          <xs:annotation>
            <xs:documentation>The x-cooridinate of the top, left corner of the icon asset relative to the ad display area</xs:documentation>
          </xs:annotation>
          <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:pattern value="([0-9]*|left|right)" />
            </xs:restriction>
          </xs:simpleType>
        </xs:attribute>
        <xs:attribute name="yPosition">
          <xs:annotation>
            <xs:documentation>The y-cooridinate of the top left corner of the icon asset relative to the ad display area.</xs:documentation>
          </xs:annotation>
          <xs:simpleType>
            <xs:restriction base="xs:string">
              <xs:pattern value="([0-9]*|top|bottom)" />
            </xs:restriction>
          </xs:simpleType>
        </xs:attribute>
        <xs:attribute name="duration" type="xs:time">
          <xs:annotation>
            <xs:documentation>The duration for which the player must display the icon. Expressed in standard time format hh:mm:ss.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="offset" type="xs:time">
          <xs:annotation>
            <xs:documentation>Start time at which the player should display the icon. Expressed in standard time format hh:mm:ss.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="apiFramework" type="xs:string">
          <xs:annotation>
            <xs:documentation>The apiFramework defines the method to use for communication with the icon element</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="pxratio" type="xs:decimal">
          <xs:annotation>
            <xs:documentation>The pixel ratio for which the icon creative is intended. The pixel ratio is the ratio of physical pixels on the device to the device-independent pixels. An ad intended for display on a device with a pixel ratio that is twice that of a standard 1:1 pixel ratio would use the value "2" Default value is "1"</xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="CreativeExtensions_type">
    <xs:sequence>
      <xs:element name="CreativeExtension" minOccurs="0" maxOccurs="unbounded">
        <xs:annotation>
          <xs:documentation>Any valid XML may be included in the Extensions node. This can occur zero to many times.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:sequence>
            <xs:any minOccurs="0" maxOccurs="unbounded" namespace="##any" processContents="skip" />
          </xs:sequence>
          <xs:attribute name="type" type="xs:string" use="optional">
            <xs:annotation>
              <xs:documentation>The MIME type of any code that might be included in the extension.</xs:documentation>
            </xs:annotation>
          </xs:attribute>
          <xs:anyAttribute namespace="##any" processContents="skip" />
        </xs:complexType>
      </xs:element>
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="AdParameters_type">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="xmlEncoded" type="xs:boolean" use="optional">
          <xs:annotation>
            <xs:documentation>Specifies whether the parameters are XML-encoded</xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:complexType name="HTMLResource_type">
    <xs:annotation>
      <xs:documentation>The URI to a static creative file to be used for the ad component identified in the parent element, which is either: &lt;NonLinear&gt;, &lt;Companion&gt;, or &lt;Icon&gt;.</xs:documentation>
    </xs:annotation>
    <xs:simpleContent>
      <xs:extension base="xs:string" />
    </xs:simpleContent>
  </xs:complexType>
  <!-- ============= Linear, NonLinear, Companion - Child content classes for Inline and Wrapper========= -->
  <xs:complexType name="Linear_Base_type">
    <xs:annotation>
      <xs:documentation>Video formatted ad that plays linearly</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="Icons" minOccurs="0" maxOccurs="1">
        <xs:complexType>
          <xs:all>
            <xs:element name="Icon" minOccurs="0" maxOccurs="1" type="vast:Icon_type">
              <xs:annotation>
                <xs:documentation>Any number of icons representing advertising industry initiatives. This can occur zero to many times. The XSD syntax can't represent that.</xs:documentation>
              </xs:annotation>
            </xs:element>
          </xs:all>
        </xs:complexType>
      </xs:element>
      <xs:element name="TrackingEvents" minOccurs="0" maxOccurs="1" type="vast:TrackingEvents_type" />
    </xs:sequence>
    <xs:attribute name="skipoffset" use="optional">
      <xs:annotation>
        <xs:documentation>The time at which the ad becomes skippable, if absent, the ad is not skippable.</xs:documentation>
      </xs:annotation>
      <xs:simpleType>
        <xs:restriction base="xs:string">
          <xs:pattern value="(\d{2}:[0-5]\d:[0-5]\d(\.\d\d\d)?|1?\d?\d(\.?\d)*%)" />
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
  </xs:complexType>
  <xs:complexType name="Linear_Wrapper_type">
    <xs:annotation>
      <xs:documentation>Video formatted ad that plays linearly</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="vast:Linear_Base_type">
        <xs:sequence>
          <xs:element name="VideoClicks" minOccurs="0" maxOccurs="1" type="vast:VideoClicks_Base_type" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Linear_Inline_type">
    <xs:annotation>
      <xs:documentation>Video formatted ad that plays linearly</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="vast:Linear_Base_type">
        <xs:sequence>
          <xs:element name="AdParameters" minOccurs="0" maxOccurs="1" type="vast:AdParameters_type">
            <xs:annotation>
              <xs:documentation>Data to be passed into the video ad. Used to pass VAST info to VPAID object.</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="Duration" minOccurs="1" maxOccurs="1" type="xs:time">
            <xs:annotation>
              <xs:documentation>Duration in standard time format, hh:mm:ss</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="MediaFiles" minOccurs="1" maxOccurs="1">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="MediaFile" minOccurs="1" maxOccurs="unbounded">
                  <xs:annotation>
                    <xs:documentation>URI location of linear file. Content must be wrapped in CDATA tag.</xs:documentation>
                  </xs:annotation>
                  <xs:complexType>
                    <xs:simpleContent>
                      <xs:extension base="xs:anyURI">
                        <xs:attribute name="id" type="xs:string" use="optional">
                          <xs:annotation>
                            <xs:documentation>Optional identifier</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="delivery" use="required">
                          <xs:annotation>
                            <xs:documentation>Either "progressive" for progressive download protocols (such as HTTP) or "streaming" for streaming protocols.</xs:documentation>
                          </xs:annotation>
                          <xs:simpleType>
                            <xs:restriction base="xs:token">
                              <xs:enumeration value="streaming" />
                              <xs:enumeration value="progressive" />
                            </xs:restriction>
                          </xs:simpleType>
                        </xs:attribute>
                        <xs:attribute name="type" type="xs:string" use="required">
                          <xs:annotation>
                            <xs:documentation>MIME type. Popular MIME types include, but are not limited to "video/x-ms-wmv" for Windows Media, and "video/x-flv" for Flash Video. Image ads or interactive ads can be included in the MediaFiles section with appropriate Mime types</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="width" type="xs:integer" use="required">
                          <xs:annotation>
                            <xs:documentation>Pixel dimensions of video</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="height" type="xs:integer" use="required">
                          <xs:annotation>
                            <xs:documentation>Pixel dimensions of video</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="codec" type="xs:string" use="optional">
                          <xs:annotation>
                            <xs:documentation>The codec used to produce the media file as specified in RFC 4281.</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="bitrate" type="xs:integer" use="optional">
                          <xs:annotation>
                            <xs:documentation>Bitrate of encoded video in Kbps. If bitrate is supplied, minBitrate and maxBitrate should not be supplied.</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="minBitrate" type="xs:integer" use="optional">
                          <xs:annotation>
                            <xs:documentation>Minimum bitrate of an adaptive stream in Kbps. If minBitrate is supplied, maxBitrate must be supplied and bitrate should not be supplied.</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="maxBitrate" type="xs:integer" use="optional">
                          <xs:annotation>
                            <xs:documentation>Maximum bitrate of an adaptive stream in Kbps. If maxBitrate is supplied, minBitrate must be supplied and bitrate should not be supplied.</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="scalable" type="xs:boolean" use="optional">
                          <xs:annotation>
                            <xs:documentation>Whether it is acceptable to scale the image.</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="maintainAspectRatio" type="xs:boolean" use="optional">
                          <xs:annotation>
                            <xs:documentation>Whether the ad must have its aspect ratio maintained when scales</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="apiFramework" type="xs:string" use="optional">
                          <xs:annotation>
                            <xs:documentation>identifies the API needed to execute an interactive media file, but current support is for backward compatibility. Please use the &lt;InteractiveCreativeFile&gt; element to include files that require an API for execution.</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                      </xs:extension>
                    </xs:simpleContent>
                  </xs:complexType>
                </xs:element>
                <xs:element name="Mezzanine" minOccurs="0" maxOccurs="1" type="xs:anyURI">
                  <xs:annotation>
                    <xs:documentation>URI location to raw, high-quality media file for high-resolution environments. Content must be wrapped in CDATA tag.</xs:documentation>
                  </xs:annotation>
                </xs:element>
                <xs:element name="InteractiveCreativeFile" minOccurs="0" maxOccurs="unbounded">
                  <xs:annotation>
                    <xs:documentation>For any media file that uses APIs for advanced creative functionality, the InteractivityCreativeFile element is used to identify the file and framework needed to execute advanced functions for the ad.</xs:documentation>
                  </xs:annotation>
                  <xs:complexType>
                    <xs:simpleContent>
                      <xs:extension base="xs:anyURI">
                        <xs:attribute name="type" type="xs:string" use="optional">
                          <xs:annotation>
                            <xs:documentation>Identifies the MIME type of the file provided.</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                        <xs:attribute name="apiFramework" type="xs:string" use="optional">
                          <xs:annotation>
                            <xs:documentation>identifies the API needed to execute the Creative file if applicable</xs:documentation>
                          </xs:annotation>
                        </xs:attribute>
                      </xs:extension>
                    </xs:simpleContent>
                  </xs:complexType>
                </xs:element>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="VideoClicks" minOccurs="0" maxOccurs="1" type="vast:VideoClicks_Inline_type" />
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="NonLinearAd_Base_type">
    <xs:annotation>
      <xs:documentation>An ad that is overlain on top of video content during playback</xs:documentation>
    </xs:annotation>
    <xs:all>
      <xs:element name="NonLinearClickTracking" minOccurs="0" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>URLs to ping when user clicks on the the non-linear ad unit. This can occur zero to many times (unbounded). The XSD syntax can't represent that.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="id" type="xs:string" use="optional">
                <xs:annotation>
                  <xs:documentation>Identifier provided to ad server for click reports</xs:documentation>
                </xs:annotation>
              </xs:attribute>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
    </xs:all>
  </xs:complexType>
  <xs:complexType name="NonLinearAd_Inline_type">
    <xs:annotation>
      <xs:documentation>An ad that is overlain on top of video content during playback</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="vast:CreativeResource_type">
        <xs:sequence>
          <xs:element name="AdParameters" minOccurs="0" maxOccurs="1" type="vast:AdParameters_type">
            <xs:annotation>
              <xs:documentation>Custom content used to pass information to ad unit</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="NonLinearClickThrough" minOccurs="0" maxOccurs="1" type="xs:anyURI">
            <xs:annotation>
              <xs:documentation>URI to advertiser page opened on viewer clicks through.</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="NonLinearClickTracking" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation>URLs to ping when user clicks on the the non-linear ad unit.</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:simpleContent>
                <xs:extension base="xs:anyURI">
                  <xs:attribute name="id" type="xs:string" use="optional">
                    <xs:annotation>
                      <xs:documentation>Identifier provided to ad server for click reports</xs:documentation>
                    </xs:annotation>
                  </xs:attribute>
                </xs:extension>
              </xs:simpleContent>
            </xs:complexType>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="CompanionAd_type">
    <xs:complexContent>
      <xs:extension base="vast:CreativeResource_type">
        <xs:sequence>
          <xs:element name="AdParameters" minOccurs="0" maxOccurs="1" type="vast:AdParameters_type">
            <xs:annotation>
              <xs:documentation>Data to be passed into the companion ads. The apiFramework defines the method to use for communication (e.g. “FlashVar”)</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="AltText" minOccurs="0" maxOccurs="1" type="xs:string">
            <xs:annotation>
              <xs:documentation>Alt text to be displayed when companion is rendered in HTML environment.</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="CompanionClickThrough" minOccurs="0" maxOccurs="1" type="xs:anyURI">
            <xs:annotation>
              <xs:documentation>URL to open as destination page when user clicks on the the companion banner ad.</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="CompanionClickTracking" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation>A URI to a tracking resource file used to track a companion clickthrough.</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:simpleContent>
                <xs:extension base="xs:anyURI">
                  <xs:attribute name="id" type="xs:string" use="required">
                    <xs:annotation>
                      <xs:documentation>An id provided by the ad server to track the click in reports.</xs:documentation>
                    </xs:annotation>
                  </xs:attribute>
                </xs:extension>
              </xs:simpleContent>
            </xs:complexType>
          </xs:element>
          <xs:element name="CreativeExtensions" minOccurs="0" maxOccurs="1" type="vast:CreativeExtensions_type" />
          <xs:element name="TrackingEvents" minOccurs="0" maxOccurs="1" type="vast:TrackingEvents_type">
            <xs:annotation>
              <xs:documentation>The creativeView should always be requested when present. For Companions creativeView is the only supported event.</xs:documentation>
            </xs:annotation>
          </xs:element>
        </xs:sequence>
        <xs:attribute name="id" type="xs:string" use="optional">
          <xs:annotation>
            <xs:documentation>Optional identifier</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="width" type="xs:integer" use="required">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of companion slot</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="height" type="xs:integer" use="required">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of companion slot</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="assetWidth" type="xs:integer" use="optional">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of the companion asset</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="assetHeight" type="xs:integer" use="optional">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of the companion asset</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="expandedWidth" type="xs:integer" use="optional">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of expanding companion ad when in expanded state</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="expandedHeight" type="xs:integer" use="optional">
          <xs:annotation>
            <xs:documentation>Pixel dimensions of expanding companion ad when in expanded state</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="apiFramework" type="xs:string" use="optional">
          <xs:annotation>
            <xs:documentation>The apiFramework defines the method to use for communication with the companion</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="adSlotID" type="xs:string" use="optional">
          <xs:annotation>
            <xs:documentation>Used to match companion creative to publisher placement areas on the page.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="pxratio" type="xs:decimal">
          <xs:annotation>
            <xs:documentation>The pixel ratio for which the icon creative is intended. The pixel ratio is the ratio of physical pixels on the device to the device-independent pixels. An ad intended for display on a device with a pixel ratio that is twice that of a standard 1:1 pixel ratio would use the value "2" Default value is "1"</xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="CompanionAds_Collection_type">
    <xs:sequence>
      <xs:element name="Companion" minOccurs="0" maxOccurs="unbounded" type="vast:CompanionAd_type">
        <xs:annotation>
          <xs:documentation>General subclass type for Companion Ad elements. This can occur zero to many times.</xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
    <xs:attribute name="required" use="optional">
      <xs:annotation>
        <xs:documentation>How the player should treat a companion ad when multiple are supplied</xs:documentation>
      </xs:annotation>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="all" />
          <xs:enumeration value="any" />
          <xs:enumeration value="none" />
        </xs:restriction>
      </xs:simpleType>
    </xs:attribute>
  </xs:complexType>
  <!-- ============= Creative Element for under a Wrapper or Inline Element ========= -->
  <xs:complexType name="Creative_Base_type">
    <xs:attribute name="sequence" type="xs:integer" use="optional">
      <xs:annotation>
        <xs:documentation>The preferred order in which multiple Creatives should be displayed</xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="apiFramework" type="xs:string" use="optional">
      <xs:annotation>
        <xs:documentation>Identifies an API needed to execute the creative</xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="id" type="xs:string" use="optional">
      <xs:annotation>
        <xs:documentation>A string used to identify the ad server that provides the creative.</xs:documentation>
      </xs:annotation>
    </xs:attribute>
    <xs:attribute name="adId" type="xs:string" use="optional">
      <xs:annotation>
        <xs:documentation>To be deprecated in future version of VAST. Ad-ID for the creative (formerly ISCI)</xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <xs:complexType name="Creative_Wrapper_type">
    <xs:complexContent>
      <xs:extension base="vast:Creative_Base_type">
        <xs:sequence>
          <xs:element name="CompanionAds" minOccurs="0" maxOccurs="1" type="vast:CompanionAds_Collection_type" />
          <xs:element name="Linear" minOccurs="0" maxOccurs="1" type="vast:Linear_Wrapper_type" />
          <xs:element name="NonLinearAds" minOccurs="0" maxOccurs="1">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="TrackingEvents" minOccurs="0" maxOccurs="1" type="vast:TrackingEvents_type" />
                <xs:element name="NonLinear" minOccurs="0" maxOccurs="unbounded" type="vast:NonLinearAd_Base_type">
                  <xs:annotation>
                    <xs:documentation>Any number of companions in any desired pixel dimensions.</xs:documentation>
                  </xs:annotation>
                </xs:element>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Creative_Inline_type">
    <xs:complexContent>
      <xs:extension base="vast:Creative_Base_type">
        <xs:all>
          <xs:element name="CompanionAds" minOccurs="0" maxOccurs="1" type="vast:CompanionAds_Collection_type" />
          <xs:element name="CreativeExtensions" minOccurs="0" maxOccurs="1" type="vast:CreativeExtensions_type" />
          <xs:element name="Linear" minOccurs="0" maxOccurs="1" type="vast:Linear_Inline_type" />
          <xs:element name="NonLinearAds" minOccurs="0" maxOccurs="1">
            <xs:complexType>
              <xs:sequence>
                <xs:element name="TrackingEvents" minOccurs="0" maxOccurs="1" type="vast:TrackingEvents_type" />
                <xs:element name="NonLinear" minOccurs="0" maxOccurs="unbounded" type="vast:NonLinearAd_Inline_type">
                  <xs:annotation>
                    <xs:documentation>Any number of companions in any desired pixel dimensions.</xs:documentation>
                  </xs:annotation>
                </xs:element>
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="UniversalAdId" minOccurs="1" maxOccurs="1">
            <xs:annotation>
              <xs:documentation>The UniversalAdId is used to provide a unique creative identifier for the purposes of tracking ad creative. This is used for Ad-ID(r) for ads served in the United States.</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:simpleContent>
                <xs:extension base="xs:string">
                  <xs:attribute name="idRegistry" type="xs:string" use="required" />
                  <xs:attribute name="idValue" type="xs:string" use="required" />
                </xs:extension>
              </xs:simpleContent>
            </xs:complexType>
          </xs:element>
        </xs:all>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <!-- ============ Base Definition of Shared Inline or Wrapper ad structure ============ -->
  <xs:complexType name="AdDefinitionBase_type">
    <xs:annotation>
      <xs:documentation>Base type structure used by Inline or Wrapper ad content element types</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="AdSystem" minOccurs="1" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>Indicates source ad server</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:string">
              <xs:attribute name="version" type="xs:string" use="optional">
                <xs:annotation>
                  <xs:documentation>Internal version used by ad system</xs:documentation>
                </xs:annotation>
              </xs:attribute>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="Error" minOccurs="0" maxOccurs="unbounded" type="xs:anyURI">
        <xs:annotation>
          <xs:documentation>URL to request if ad does not play due to error</xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name="Extensions" minOccurs="0" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>XML node for custom extensions, as defined by the ad server. When used, a custom element should be nested under &lt;Extensions&gt; to help separate custom XML elements from VAST elements.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:sequence>
            <xs:element name="Extension" minOccurs="0" maxOccurs="unbounded">
              <xs:annotation>
                <xs:documentation>One instance of &lt;Extension&gt; should be used for each custom extension. The type attribute identifies the MIME type of any code provided in the extension.</xs:documentation>
              </xs:annotation>
              <xs:complexType>
                <xs:sequence>
                  <xs:any minOccurs="0" maxOccurs="unbounded" processContents="skip" />
                </xs:sequence>
                <xs:attribute name="type" type="xs:string" use="optional">
                  <xs:annotation>
                    <xs:documentation>The MIME type of any code that might be included in the extension.</xs:documentation>
                  </xs:annotation>
                </xs:attribute>
              </xs:complexType>
            </xs:element>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="Impression" minOccurs="1" maxOccurs="unbounded" type="vast:Impression_type">
        <xs:annotation>
          <xs:documentation>URI for impression tracking</xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name="Pricing" minOccurs="0" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>The price of the ad that can be used in real time bidding systems.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:decimal">
              <xs:attribute name="model" use="required">
                <xs:annotation>
                  <xs:documentation>The pricing model used.</xs:documentation>
                </xs:annotation>
                <xs:simpleType>
                  <xs:restriction base="xs:token">
                    <xs:enumeration value="CPC" />
                    <xs:enumeration value="CPM" />
                    <xs:enumeration value="CPE" />
                    <xs:enumeration value="CPV" />
                    <xs:enumeration value="cpc" />
                    <xs:enumeration value="cpm" />
                    <xs:enumeration value="cpe" />
                    <xs:enumeration value="cpv" />
                  </xs:restriction>
                </xs:simpleType>
              </xs:attribute>
              <xs:attribute name="currency" use="required">
                <xs:annotation>
                  <xs:documentation>Three letter ISO-4217 currency symbol that identifies the currency of the value provied. Ex: USD, GBP, etc.</xs:documentation>
                </xs:annotation>
                <xs:simpleType>
                  <xs:restriction base="xs:string">
                    <xs:pattern value="[a-zA-Z]{3}" />
                  </xs:restriction>
                </xs:simpleType>
              </xs:attribute>
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="ViewableImpression" minOccurs="0" maxOccurs="1" type="vast:ViewableImpression_type" />
    </xs:sequence>
  </xs:complexType>
  <xs:complexType name="ViewableImpression_type" >
    <xs:annotation>
      <xs:documentation>The ViewableImpression element allows for tracking URIs to report viewability</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="Viewable" minOccurs="0" maxOccurs="unbounded" type="xs:anyURI">
        <xs:annotation>
          <xs:documentation>A URI that directs the video player to a tracking resource file that the video player should request at the time that criteria is met for a viewable impression. This can occur zero to many times.</xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name="NotViewable" minOccurs="0" maxOccurs="unbounded" type="xs:anyURI">
        <xs:annotation>
          <xs:documentation>A URI that directs the video player to a tracking resource file that the video player should request if the ad is executed but never meets criteria for a viewable impression.</xs:documentation>
        </xs:annotation>
      </xs:element>
      <xs:element name="ViewUndetermined" minOccurs="0" maxOccurs="unbounded" type="xs:anyURI">
        <xs:annotation>
          <xs:documentation>A URI that directs the video player to a tracking resource file that the video player should request if the player cannot determine whether criteria is met for a viewable impression. This can occur zero to many times.</xs:documentation>
        </xs:annotation>
      </xs:element>
    </xs:sequence>
    <xs:attribute name="id" type="xs:string" use="optional">
      <xs:annotation>
        <xs:documentation>An ad server id for the impression. Impression resources of the same id should be requested at the same time or as close in time as possible to help prevent discrepancies.</xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <!-- ============ Simple Verification type used under Wrapper elements =============== -->
  <xs:complexType name="Verification_Wrapper_type" >
    <xs:annotation>
      <xs:documentation>Verification elements are nested under AdVerifications. The Verification element is used to contain the JavaScript or Flash code used to collect data. Multiple Verification elements may be used in cases where more than one verification vendor needs to collect data or when different API frameworks are used.</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="ViewableImpression" minOccurs="0" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>The name of the event to track for the element. The creativeView should always be requested when present.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="id" type="xs:string" use="optional" />
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
    <xs:attribute name="vendor" type="xs:string" use="optional" />
  </xs:complexType>
  <!-- ============ Verification type used under Inline elements =============== -->
  <xs:complexType name="Verification_Inline_type">
    <xs:annotation>
      <xs:documentation>Verification elements are nested under AdVerifications. The Verification element is used to contain the JavaScript or Flash code used to collect data. Multiple Verification elements may be used in cases where more than one verification vendor needs to collect data or when different API frameworks are used. When included, verification contents must be executed (if possible) BEFORE the media file or interactive creative file is executed, to ensure verification can track ad play as intended.</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="FlashResource" minOccurs="0" maxOccurs="unbounded">
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="apiFramework" type="xs:string" use="optional" />
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="JavaScriptResource" minOccurs="0" maxOccurs="unbounded">
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="apiFramework" type="xs:string" use="optional" />
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
      <xs:element name="ViewableImpression" minOccurs="0" maxOccurs="1">
        <xs:annotation>
          <xs:documentation>The name of the event to track for the element. The creativeView should always be requested when present.</xs:documentation>
        </xs:annotation>
        <xs:complexType>
          <xs:simpleContent>
            <xs:extension base="xs:anyURI">
              <xs:attribute name="id" type="xs:string" use="optional" />
            </xs:extension>
          </xs:simpleContent>
        </xs:complexType>
      </xs:element>
    </xs:sequence>
    <xs:attribute name="vendor" type="xs:string" use="optional">
      <xs:annotation>
        <xs:documentation>The home page URL for the verification service provider that supplies the resource file.</xs:documentation>
      </xs:annotation>
    </xs:attribute>
  </xs:complexType>
  <!-- ========== Definition of the AdVerifications element type ========== -->
  <xs:complexType name="AdVerifications_Wrapper_type" >
    <xs:annotation>
      <xs:documentation>The AdVerification element is used to initiate a controlled container where code can be executed for collecting data to verify ad playback details.</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="Verification" minOccurs="0" maxOccurs="unbounded" type="vast:Verification_Wrapper_type" />
    </xs:sequence>
  </xs:complexType>
  <!-- ========== Definition of the AdVerifications Inline element type ========== -->
  <xs:complexType name="AdVerifications_Inline_type" >
    <xs:annotation>
      <xs:documentation>The AdVerification element is used to initiate a controlled container where code can be executed for collecting data to verify ad playback details.</xs:documentation>
    </xs:annotation>
    <xs:sequence>
      <xs:element name="Verification" minOccurs="0" maxOccurs="unbounded" type="vast:Verification_Inline_type" />
    </xs:sequence>
  </xs:complexType>
  <!-- ========== Definition of the Wrapper element type ========== -->
  <xs:complexType name="Wrapper_type">
    <xs:complexContent>
      <xs:extension base="vast:AdDefinitionBase_type">
        <xs:sequence>
          <xs:element name="AdVerifications" minOccurs="0" maxOccurs="1" type="vast:AdVerifications_Wrapper_type" />
          <xs:element name="Creatives" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation>A container for one or more Creative elements used to provide creative files for ad.</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:sequence>
                <xs:element name="Creative" minOccurs="1" maxOccurs="unbounded" type="vast:Creative_Wrapper_type" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="VASTAdTagURI" minOccurs="1" maxOccurs="1" type="xs:anyURI">
            <xs:annotation>
              <xs:documentation>A URI to another VAST response that may be another VAST Wrapper or a VAST InLine ad.</xs:documentation>
            </xs:annotation>
          </xs:element>
        </xs:sequence>
        <xs:attribute name="followAdditionalWrappers" type="xs:boolean">
          <xs:annotation>
            <xs:documentation>a Boolean value that identifies whether subsequent wrappers after a requested VAST response is allowed.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="allowMultipleAds" type="xs:boolean">
          <xs:annotation>
            <xs:documentation>a Boolean value that identifies whether multiple ads are allowed in the requested VAST response.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
        <xs:attribute name="fallbackOnNoAd" type="xs:boolean">
          <xs:annotation>
            <xs:documentation>a Boolean value that provides instruction for using an available Ad when the requested VAST response returns no ads.</xs:documentation>
          </xs:annotation>
        </xs:attribute>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <!-- ========== Definition of the Inline element type ========== -->
  <xs:complexType name="Inline_type">
    <xs:complexContent>
      <xs:extension base="vast:AdDefinitionBase_type">
        <xs:sequence>
          <xs:element name="AdTitle" minOccurs="1" maxOccurs="1" type="xs:string">
            <xs:annotation>
              <xs:documentation>Common name of ad</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="AdVerifications" minOccurs="0" maxOccurs="1" type="vast:AdVerifications_Inline_type" />
          <xs:element name="Advertiser" minOccurs="0" maxOccurs="1" type="xs:string">
            <xs:annotation>
              <xs:documentation>Name of advertiser as defined by the ad serving party</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="Category" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation>A string that provides a category code or label that identifies the ad content.</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:simpleContent>
                <xs:extension base="xs:string">
                  <xs:attribute name="authority" type="xs:anyURI" use="required">
                    <xs:annotation>
                      <xs:documentation>A URI for the organizational authority that produced the list being used to identify ad content.</xs:documentation>
                    </xs:annotation>
                  </xs:attribute>
                </xs:extension>
              </xs:simpleContent>
            </xs:complexType>
          </xs:element>
          <xs:element name="Creatives" minOccurs="1" maxOccurs="1">
            <xs:annotation>
              <xs:documentation>A container for one or more Creative elements used to provide creative files for ad.</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:sequence>
                <xs:element name="Creative" minOccurs="1" maxOccurs="unbounded" type="vast:Creative_Inline_type" />
              </xs:sequence>
            </xs:complexType>
          </xs:element>
          <xs:element name="Description" minOccurs="0" maxOccurs="1" type="xs:string">
            <xs:annotation>
              <xs:documentation>Longer description of ad</xs:documentation>
            </xs:annotation>
          </xs:element>
          <xs:element name="Survey" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation>URL of request to survey vendor</xs:documentation>
            </xs:annotation>
            <xs:complexType>
              <xs:simpleContent>
                <xs:extension base="xs:anyURI">
                  <xs:attribute name="type" type="xs:string" use="optional">
                    <xs:annotation>
                      <xs:documentation>MIME type of the resource being served</xs:documentation>
                    </xs:annotation>
                  </xs:attribute>
                </xs:extension>
              </xs:simpleContent>
            </xs:complexType>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>