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Versions: 00 01 03 draft-ietf-clue-data-model-schema

CLUE Working Group                                             R. Presta
Internet-Draft                                               S P. Romano
Intended status: Informational                      University of Napoli
Expires: April 4, 2013                                   October 1, 2012


                 An XML Schema for the CLUE data model
                 draft-presta-clue-data-model-schema-01

Abstract

   This document provides an XML schema file for the definition of CLUE
   data model types.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on April 4, 2013.

Copyright Notice

   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.






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Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3.  XML Schema . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   4.  Sample XML file  . . . . . . . . . . . . . . . . . . . . . . . 10
   5.  Diff with -00 version  . . . . . . . . . . . . . . . . . . . . 15
   6.  Informative References . . . . . . . . . . . . . . . . . . . . 15











































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1.  Introduction

   This document provides an XML schema file for the definition of CLUE
   data model types.  The schema is based on information contained in
   [I-D.ietf-clue-framework] and also relates to the data model sketched
   in [I-D.romanow-clue-data-model].  The document actually represents a
   strawman proposal aiming at the definition of a coherent structure
   for all the information associated with the description of a
   telepresence scenario.

2.  Terminology

   [TBD] Copy text from framework document.

3.  XML Schema

   This section contains the proposed CLUE data model schema definition.
   The overall structure of the CLUE data has been derived starting from
   a data type called "clueInfoType" which comprises the following
   subelements:

      mediaCaptures: the list of media captures available

      captureScenes: the list of capture scenes

      encodings: the list of individual encodings

      encodingGroups: the list of encodings which have been grouped
      together

      simultaneousSets: the list of simultaneous capture sets

   All of the above elements refer to concepts that have been introduced
   and explained in [I-D.ietf-clue-framework] and
   [I-D.romanow-clue-data-model].  Indeed, the mapping is not exactly
   one-to-one because: (i) some details of the current data model were
   not clear enough to be properly included in the schema herein
   presented; (ii) we slightly modified naming conventions in order to
   let schema elements better adhere to current XML best naming
   practices; (iii) we sometimes changed the structure of some of the
   data elements presented in [I-D.romanow-clue-data-model] in order to
   enhance the semantic expressiveness of CLUE XML documents.



<?xml version="1.0" encoding="UTF-8" ?>
   <xs:schema
   targetNamespace="urn:ietf:params:xml:ns:clue-info"



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   xmlns:tns="urn:ietf:params:xml:ns:clue-info"
   xmlns:xs="http://www.w3.org/2001/XMLSchema"
   xmlns="urn:ietf:params:xml:ns:clue-info"
   elementFormDefault="qualified"
   attributeFormDefault="unqualified">

      <!--This imports the xml:language definition-->
      <xs:import
      namespace="http://www.w3.org/XML/1998/namespace"
      schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>

      <!-- CLUE INFO ELEMENT -->
      <xs:element name="clueInfo" type="clueInfoType"/>

      <!-- CLUE INFO TYPE -->
      <xs:complexType name="clueInfoType">
       <xs:sequence>
        <xs:element name="mediaCaptures" type="mediaCapturesType"/>
        <xs:element name="captureScenes" type="captureScenesType"/>
        <xs:element name="encodings" type="encodingsType"/>
        <xs:element name="encodingGroups" type="encodingGroupsType"/>
        <xs:element name="simultaneousSets" type="simultaneousSetsType"/>
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
       </xs:sequence>
       <!-- TODO: check if any attribute can be needed -->
       <xs:attribute name="clueInfoID" type="xs:ID" use="required"/>
       <xs:anyAttribute namespace="##other" processContents="lax"/>
      </xs:complexType>


      <!-- ENCODINGS TYPE -->
      <xs:complexType name="encodingsType">
       <xs:sequence>
        <xs:element name="encoding" type="encodingType" maxOccurs="unbounded"/>
       </xs:sequence>
      </xs:complexType>



      <!-- ENCODING TYPE -->
      <xs:complexType name="encodingType" abstract="true">
       <xs:sequence>
        <xs:element name="encodingName" type="xs:string"/>
        <xs:element name="maxBandwidth" type="xs:integer"/>
        <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
       </xs:sequence>
       <xs:attribute name="encodingID" type="xs:ID" use="required"/>
       <xs:anyAttribute namespace="##any" processContents="lax"/>



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      </xs:complexType>

      <!-- AUDIO ENCODING TYPE -->
      <xs:complexType name="audioEncodingType">
       <xs:complexContent>
           <xs:extension base="tns:encodingType">
            <xs:sequence>
             <xs:element name="encodedMedia" type="xs:string" fixed="audio"  minOccurs="0"/>
            </xs:sequence>
           </xs:extension>
       </xs:complexContent>
      </xs:complexType>

      <!-- VIDEO ENCODING TYPE -->
      <xs:complexType name="videoEncodingType">
       <xs:complexContent>
           <xs:extension base="tns:encodingType">
            <xs:sequence>
             <xs:element name="encodedMedia" type="xs:string" fixed="video"  minOccurs="0"/>
             <xs:element name="maxWidth" type="xs:integer" minOccurs="0"/>
             <xs:element name="maxHeight" type="xs:integer" minOccurs="0"/>
             <xs:element name="maxFrameRate" type="xs:integer" minOccurs="0"/>
            </xs:sequence>
           </xs:extension>
        </xs:complexContent>
       </xs:complexType>

       <!-- H264 ENCODING TYPE -->
      <xs:complexType name="h264EncodingType">
       <xs:complexContent>
           <xs:extension base="tns:videoEncodingType">
            <xs:sequence>
             <xs:element name="maxH264MacroBlocksRate" type="xs:integer" minOccurs="0"/>
            </xs:sequence>
           </xs:extension>
        </xs:complexContent>
       </xs:complexType>

      <!-- ENCODING GROUPS TYPE -->
      <xs:complexType name="encodingGroupsType">
      <xs:sequence>
       <xs:element name="encodingGroup" type="tns:encodingGroupType" maxOccurs="unbounded"/>
      </xs:sequence>
      </xs:complexType>

       <!-- ENCODING GROUP TYPE -->
       <xs:complexType name="encodingGroupType">
        <xs:sequence>



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         <xs:element name="maxGroupBandwidth" type="xs:integer"/>
         <xs:element name="maxGroupH264MacroBlockRate" type="xs:integer" minOccurs="0"/>
         <xs:element name="encodingIDList" type="encodingIDListType"/>
         <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute name="encodingGroupID" type="xs:ID" use="required"/>
        <xs:anyAttribute namespace="##any" processContents="lax"/>
       </xs:complexType>

       <!-- ENCODING ID LIST TYPE -->
       <xs:complexType name="encodingIDListType">
        <xs:sequence>
         <xs:element name="encIDREF" type="xs:IDREF" maxOccurs="unbounded"/>
        </xs:sequence>
       </xs:complexType>

       <!-- MEDIA CAPTURES TYPE -->
       <xs:complexType name="mediaCapturesType">
        <xs:sequence>
         <xs:element name="mediaCapture" type="mediaCaptureType" maxOccurs="unbounded"/>
        </xs:sequence>
       </xs:complexType>

       <!-- MEDIA CAPTURE TYPE -->
       <xs:complexType name="mediaCaptureType" abstract="true">
        <xs:sequence>
         <xs:element name="description" type="xs:string" minOccurs="0"/>
         <xs:element name="encGroupIDREF" type="xs:IDREF"/>
         <xs:element name="capturedMedia" type="xs:string"/>
         <xs:element name="spatialDescription" type="spatialDescriptionType"/>
         <xs:element name="content" type="xs:string" minOccurs="0"/>
         <xs:element name="derived" type="xs:boolean" minOccurs="0"/>
         <xs:element name="switched" type="xs:boolean" minOccurs="0"/>
         <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute name="captureID" type="xs:ID" use="required"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
       </xs:complexType>

       <!-- AUDIO CAPTURE TYPE -->
       <xs:complexType name="audioCaptureType">
        <xs:complexContent>
         <xs:extension base="tns:mediaCaptureType">
          <xs:sequence>
           <xs:element name="audioChannelFormat" type="audioChannelFormatType" minOccurs="0"/>
          </xs:sequence>
         </xs:extension>
        </xs:complexContent>



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       </xs:complexType>

       <!-- AUDIO CHANNEL FORMAT TYPE -->
       <xs:simpleType name="audioChannelFormatType">
        <xs:restriction base="xs:string">
         <xs:enumeration value="mono"/>
         <xs:enumeration value="stereo"/>
        </xs:restriction>
       </xs:simpleType>

       <!-- VIDEO CAPTURE TYPE -->
       <xs:complexType name="videoCaptureType">
        <xs:complexContent>
         <xs:extension base="tns:mediaCaptureType">
          <xs:sequence>
           <xs:element name="nativeAspectRatio" type="xs:string" minOccurs="0"/>
          </xs:sequence>
         </xs:extension>
        </xs:complexContent>
       </xs:complexType>


       <!-- SPATIAL DESCRIPTION TYPE -->
       <xs:complexType name="spatialDescriptionType">
        <xs:sequence>
         <xs:element name="capturePoint" type="capturePointType" minOccurs="0"/>
         <xs:element name="captureArea" type="captureAreaType" minOccurs="0"/>
         <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute name="scale" type="scaleType" use="required"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
       </xs:complexType>

       <!-- SCALE TYPE -->
       <xs:simpleType name="scaleType">
        <xs:restriction base="xs:string">
         <xs:enumeration value="millimeters"/>
         <xs:enumeration value="unknown"/>
         <xs:enumeration value="noscale"/>
        </xs:restriction>
       </xs:simpleType>


       <!-- POINT TYPE -->
       <xs:complexType name="pointType">
                <xs:sequence>
                 <xs:element name="x" type="xs:decimal"/>
                 <xs:element name="y" type="xs:decimal"/>



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                 <xs:element name="z" type="xs:decimal"/>
                </xs:sequence>
       </xs:complexType>

       <!-- CAPTURE POINT TYPE -->
       <xs:complexType name="capturePointType">
        <xs:complexContent>
         <xs:extension base="pointType">
          <xs:sequence>
           <xs:element name="captureAxisPoint" type="tns:pointType" minOccurs="0"/>
          </xs:sequence>
         </xs:extension>
        </xs:complexContent>
       </xs:complexType>


       <!-- CAPTURE AREA TYPE -->
       <xs:complexType name="captureAreaType">
        <xs:sequence>
         <xs:element name="bottomLeft" type="pointType"/>
         <xs:element name="bottomRight" type="pointType"/>
         <xs:element name="topLeft" type="pointType"/>
         <xs:element name="topRight" type="pointType"/>
        </xs:sequence>
       </xs:complexType>

         <!-- CAPTURE SCENES TYPE -->
         <xs:complexType name="captureScenesType">
          <xs:sequence>
           <xs:element name="captureScene" type="captureSceneType" maxOccurs="unbounded"/>
          </xs:sequence>
         </xs:complexType>

         <!-- CAPTURE SCENE TYPE -->
         <xs:complexType name="captureSceneType">
                <xs:sequence>
                 <xs:element name="sceneDescription" type="xs:string" minOccurs="0"/>
                 <xs:element name="sceneLanguge" type="xs:string" minOccurs="0"/>
                 <xs:element name="sceneArea" type="sceneAreaType" minOccurs="0"/>
                 <xs:element name="sceneEntries" type="sceneEntriesType"/>
                 <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
                </xs:sequence>
                <xs:attribute name="sceneID" type="xs:ID" use="required"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
         </xs:complexType>

     <!-- SCENE AREA TYPE -->
     <xs:complexType name="sceneAreaType">



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      <xs:complexContent>
       <xs:extension base="captureAreaType">
        <xs:attribute name="scale" type="scaleType" use="required"/>
        <xs:anyAttribute namespace="##other" processContents="lax"/>
       </xs:extension>
      </xs:complexContent>
     </xs:complexType>

     <!-- SCENE ENTRIES TYPE -->
     <xs:complexType name="sceneEntriesType">
      <xs:sequence>
       <xs:element name="sceneEntry" type="sceneEntryType" maxOccurs="unbounded"/>
      </xs:sequence>
     </xs:complexType>

     <!-- SCENE ENTRY TYPE -->
     <xs:complexType name="sceneEntryType">
      <xs:sequence>
       <xs:element name="sceneEntryDescription" type="xs:string"/>
       <xs:element name="captureIDList" type="captureIDListType"/>
       <xs:element name="switchingPolicies" type="switchingPoliciesType" minOccurs="0"/>
      </xs:sequence>
      <xs:attribute name="entryID" type="xs:ID" use="required"/>
      <xs:attribute name="mediaType" type="xs:string" use="required"/>
     </xs:complexType>

     <!-- CAPTURE ID LIST TYPE -->
     <xs:complexType name="captureIDListType">
      <xs:sequence>
       <xs:element name="captureIDREF" type="xs:IDREF" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="ID" type="xs:ID" use="required"/>
     </xs:complexType>

     <!-- SWITCHING POLICIES TYPE -->
     <xs:complexType name="switchingPoliciesType">
      <xs:sequence>
       <xs:element name="siteSwitching" type="xs:boolean" minOccurs="0"/>
       <xs:element name="segmentSwitching" type="xs:boolean" minOccurs="0"/>
      </xs:sequence>
     </xs:complexType>

     <!-- SIMULTANEOUS SETS TYPE -->
     <xs:complexType name="simultaneousSetsType">
      <xs:sequence>
       <xs:element name="simultaneousSet" type="captureIDListType" maxOccurs="unbounded"/>
      </xs:sequence>
     </xs:complexType>



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   </xs:schema>



4.  Sample XML file

   The following XML document represents a schema compliant example of a
   CLUE telepresence scenario.

   The example describes a scenario similar to the one in section 11.1
   of [I-D.ietf-clue-framework].  There are 6 video captures:

   VC0:  the video from the left camera

   VC1:  the video from the central camera

   VC2:  the video from the right camera

   VC3:  the video of the loudest segment of the room taken from the
      central camera

   VC4:  the overall view of the telepresence room taken from the
      central camera

   VC5:  the video associated with the slide stream

   There are 2 audio captures:

   AC0:  the overall room audio

   AC1:  the audio associated with the slide stream presentation




<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<clueInfo xmlns="urn:ietf:params:xml:ns:clue-info" clueInfoID="01">
    <mediaCaptures>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="videoCaptureType" captureID="VC0">
            <description>left camera video</description>
            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>video</capturedMedia>
            <content>main</content>
            <derived>false</derived>
            <switched>false</switched>
        </mediaCapture>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="videoCaptureType" captureID="VC1">
            <description>central camera video</description>



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            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>video</capturedMedia>
            <content>main</content>
            <derived>false</derived>
            <switched>false</switched>
        </mediaCapture>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="videoCaptureType" captureID="VC2">
            <description>right camera video</description>
            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>video</capturedMedia>
            <content>main</content>
            <derived>false</derived>
            <switched>false</switched>
        </mediaCapture>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="videoCaptureType" captureID="VC3">
            <description>video capture of the loudest room segment</description>
            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>video</capturedMedia>
            <content>main</content>
            <derived>false</derived>
            <switched>true</switched>
        </mediaCapture>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="videoCaptureType" captureID="VC4">
            <description>zoomed out view of the room</description>
            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>video</capturedMedia>
                        <spatialDescription scale="unknown">
                <captureArea>
                    <bottomLeft>
                        <x>-2011</x>
                        <y>2850</y>
                        <z>0</z>
                    </bottomLeft>
                    <bottomRight>
                        <x>-673</x>
                        <y>3000</y>
                        <z>0</z>
                    </bottomRight>
                    <topLeft>
                        <x>-2011</x>
                        <y>2850</y>
                        <z>757</z>
                    </topLeft>
                    <topRight>
                        <x>-673</x>
                        <y>3000</y>
                        <z>757</z>
                    </topRight>



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                </captureArea>
            </spatialDescription>
            <content>main</content>
            <derived>false</derived>
            <switched>false</switched>
        </mediaCapture>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="videoCaptureType" captureID="VC5">
            <description>presentation slides</description>
            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>video</capturedMedia>
            <content>slides</content>
            <derived>false</derived>
            <switched>false</switched>
        </mediaCapture>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="audioCaptureType" captureID="AC0">
            <description>room audio</description>
            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>audio</capturedMedia>
            <content>main</content>
            <derived>false</derived>
            <spatialDescription scale="unknown">
                <capturePoint xsi:type="capturePointType">
                    <x>0</x>
                    <y>0</y>
                    <z>0</z>
                    <captureAxisPoint>
                        <x>0</x>
                        <y>1</y>
                        <z>1</z>
                    </captureAxisPoint>
                </capturePoint>
            </spatialDescription>
            <audioChannelFormat>mono</audioChannelFormat>
        </mediaCapture>
        <mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="audioCaptureType" captureID="AC1">
            <description>presentation audio</description>
            <encGroupIDREF>EG1</encGroupIDREF>
            <capturedMedia>audio</capturedMedia>
            <content>slides</content>
            <derived>false</derived>
            <audioChannelFormat>mono</audioChannelFormat>
        </mediaCapture>
    </mediaCaptures>
    <captureScenes>
        <captureScene sceneID="CS1">
            <sceneDescription>main room scene</sceneDescription>
            <sceneEntries>
                <sceneEntry entryID="SE1" mediaType="video">



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                    <sceneEntryDescription>zoomed in participant videos</sceneEntryDescription>
                    <captureIDList>
                        <captureIDREF>VC0</captureIDREF>
                        <captureIDREF>VC1</captureIDREF>
                        <captureIDREF>VC2</captureIDREF>
                    </captureIDList>
                </sceneEntry>
                <sceneEntry entryID="SE2" mediaType="audio">
                    <sceneEntryDescription>room audio</sceneEntryDescription>
                    <captureIDList>
                        <captureIDREF>AC0</captureIDREF>
                    </captureIDList>
                </sceneEntry>
                <sceneEntry entryID="SE3" mediaType="video">
                    <sceneEntryDescription>loudest room segment</sceneEntryDescription>
                    <captureIDList>
                        <captureIDREF>VC3</captureIDREF>
                    </captureIDList>
                </sceneEntry>
                <sceneEntry entryID="SE4" mediaType="video">
                    <sceneEntryDescription>room view</sceneEntryDescription>
                    <captureIDList>
                        <captureIDREF>VC4</captureIDREF>
                    </captureIDList>
                </sceneEntry>
            </sceneEntries>
        </captureScene>
        <captureScene sceneID="CS2">
            <sceneDescription>presentation view</sceneDescription>
            <sceneEntries>
                <sceneEntry entryID="SE5" mediaType="video">
                    <sceneEntryDescription>presentation video</sceneEntryDescription>
                    <captureIDList>
                        <captureIDREF>VC5</captureIDREF>
                    </captureIDList>
                </sceneEntry>
                <sceneEntry entryID="SE6" mediaType="audio">
                    <sceneEntryDescription>presentation audio</sceneEntryDescription>
                    <captureIDList>
                        <captureIDREF>AC1</captureIDREF>
                    </captureIDList>
                </sceneEntry>
            </sceneEntries>
        </captureScene>
    </captureScenes>
    <encodings>
        <encoding xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="h264EncodingType" encodingID="V_ENC1">
            <encodingName>H264</encodingName>



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            <maxBandwidth>14</maxBandwidth>
            <encodedMedia>video</encodedMedia>
            <maxWidth>1080</maxWidth>
            <maxHeight>60</maxHeight>
            <maxFrameRate>11</maxFrameRate>
            <maxH264MacroBlocksRate>12</maxH264MacroBlocksRate>
        </encoding>
        <encoding xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="audioEncodingType" encodingID="A_ENC1">
            <encodingName>G711</encodingName>
            <maxBandwidth>64</maxBandwidth>
            <encodedMedia>audio</encodedMedia>
        </encoding>
    </encodings>
    <encodingGroups>
        <encodingGroup encodingGroupID="EG1">
            <maxGroupBandwidth>17</maxGroupBandwidth>
            <maxGroupH264MacroBlockRate>19</maxGroupH264MacroBlockRate>
            <encodingIDList>
                <encIDREF>V_ENC1</encIDREF>
                <encIDREF>A_ENC1</encIDREF>
            </encodingIDList>
        </encodingGroup>
    </encodingGroups>
    <simultaneousSets>
        <simultaneousSet ID="S1">
            <captureIDREF>VC0</captureIDREF>
            <captureIDREF>VC1</captureIDREF>
            <captureIDREF>VC2</captureIDREF>
            <captureIDREF>VC5</captureIDREF>
            <captureIDREF>AC0</captureIDREF>
            <captureIDREF>AC1</captureIDREF>
        </simultaneousSet>
        <simultaneousSet ID="S2">
            <captureIDREF>VC0</captureIDREF>
            <captureIDREF>VC3</captureIDREF>
            <captureIDREF>VC2</captureIDREF>
            <captureIDREF>VC5</captureIDREF>
            <captureIDREF>AC0</captureIDREF>
            <captureIDREF>AC1</captureIDREF>
        </simultaneousSet>
        <simultaneousSet ID="S3">
            <captureIDREF>VC0</captureIDREF>
            <captureIDREF>VC4</captureIDREF>
            <captureIDREF>VC2</captureIDREF>
            <captureIDREF>VC5</captureIDREF>
            <captureIDREF>AC0</captureIDREF>
            <captureIDREF>AC1</captureIDREF>
        </simultaneousSet>



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    </simultaneousSets>
</clueInfo>







5.  Diff with -00 version

      captureAreaType: bottomUp & co. typos corrected (see Roni's email)

      spatialDescription in mediaCaptureType now is mandatory

      captureAxisPoint now embedded in capturePointType as an optional
      element

      nativeAspectRatio as described in [I-D.romanow-clue-data-model]
      added as an optional videoCaptureType element

      clueInfoID added as required attribute for the clueInfoType

      spatialDescription added for capture VC4 and AC0 in the XML
      example, which is now coherent with the new XML Schema

6.  Informative References

   [I-D.ietf-clue-framework]      Romanow, A., Duckworth, M., Pepperell,
                                  A., and B. Baldino, "Framework for
                                  Telepresence Multi-Streams",
                                  draft-ietf-clue-framework-06 (work in
                                  progress), July 2012.

   [I-D.romanow-clue-data-model]  Romanow, A. and A. Pepperell, "Data
                                  model for the CLUE Framework",
                                  draft-romanow-clue-data-model-01 (work
                                  in progress), June 2012.













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Authors' Addresses

   Roberta Presta
   University of Napoli
   Via Claudio 21
   Napoli  80125
   Italy

   EMail: roberta.presta@unina.it


   Simon Pietro Romano
   University of Napoli
   Via Claudio 21
   Napoli  80125
   Italy

   EMail: spromano@unina.it

































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