An XML Schema for the CLUE data model
draft-ietf-clue-data-model-schema-11
The information below is for an old version of the document.
| Document | Type |
This is an older version of an Internet-Draft that was ultimately published as RFC 8846.
|
|
|---|---|---|---|
| Authors | Roberta Presta , Simon Pietro Romano | ||
| Last updated | 2015-10-19 | ||
| Replaces | draft-presta-clue-data-model-schema | ||
| RFC stream | Internet Engineering Task Force (IETF) | ||
| Formats | |||
| Reviews |
GENART Last Call review
(of
-14)
by Francis Dupont
Ready w/nits
GENART Last Call review
(of
-13)
by Francis Dupont
Ready w/nits
|
||
| Additional resources | Mailing list discussion | ||
| Stream | WG state | In WG Last Call | |
| Document shepherd | Roni Even | ||
| IESG | IESG state | Became RFC 8846 (Proposed Standard) | |
| Consensus boilerplate | Unknown | ||
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
draft-ietf-clue-data-model-schema-11
lt;mediaCaptures>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="audioCaptureType" captureID="AC0" mediaType="audio">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG1</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
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<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">main audio from the room</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>room</view>
<capturedPeople>
<personIDREF>alice</personIDREF>
<personIDREF>bob</personIDREF>
<personIDREF>ciccio</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC0" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">left camera video capture</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
<capturedPeople>
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<personIDREF>ciccio</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC1" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">central camera video capture</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
<capturedPeople>
<personIDREF>alice</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC2" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
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</spatialInformation>
<individual>true</individual>
<description lang="en">right camera video capture</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
<capturedPeople>
<personIDREF>bob</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC3" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<nonSpatiallyDefinable>true</nonSpatiallyDefinable>
<policy>Soundlevel:0</policy>
<description lang="en">loudest room segment</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC4" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">zoomed out view of all people in the
room</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>room</view>
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<capturedPeople>
<personIDREF>alice</personIDREF>
<personIDREF>bob</personIDREF>
<personIDREF>ciccio</personIDREF>
</capturedPeople>
</mediaCapture>
</mediaCaptures>
<encodingGroups>
<encodingGroup encodingGroupID="EG0">
<maxGroupBandwidth>600000</maxGroupBandwidth>
<encodingIDList>
<encID>ENC1</encID>
<encID>ENC2</encID>
<encID>ENC3</encID>
</encodingIDList>
</encodingGroup>
<encodingGroup encodingGroupID="EG1">
<maxGroupBandwidth>300000</maxGroupBandwidth>
<encodingIDList>
<encID>ENC4</encID>
<encID>ENC5</encID>
</encodingIDList>
</encodingGroup>
</encodingGroups>
<captureScenes>
<captureScene scale="unknown" sceneID="CS1">
<sceneViews>
<sceneView sceneViewID="SE1">
<mediaCaptureIDs>
<captureIDREF>VC0</captureIDREF>
<captureIDREF>VC1</captureIDREF>
<captureIDREF>VC2</captureIDREF>
</mediaCaptureIDs>
</sceneView>
<sceneView sceneViewID="SE2">
<mediaCaptureIDs>
<captureIDREF>VC3</captureIDREF>
</mediaCaptureIDs>
</sceneView>
<sceneView sceneViewID="SE3">
<mediaCaptureIDs>
<captureIDREF>VC4</captureIDREF>
</mediaCaptureIDs>
</sceneView>
<sceneView sceneViewID="SE4">
<mediaCaptureIDs>
<captureIDREF>VC4</captureIDREF>
</mediaCaptureIDs>
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</sceneView>
</sceneViews>
</captureScene>
</captureScenes>
<simultaneousSets>
<simultaneousSet setID="SS1">
<mediaCaptureIDREF>VC3</mediaCaptureIDREF>
<sceneViewIDREF>SE1</sceneViewIDREF>
</simultaneousSet>
<simultaneousSet setID="SS2">
<mediaCaptureIDREF>VC0</mediaCaptureIDREF>
<mediaCaptureIDREF>VC2</mediaCaptureIDREF>
<mediaCaptureIDREF>VC4</mediaCaptureIDREF>
<mediaCaptureIDREF>VC3</mediaCaptureIDREF>
</simultaneousSet>
</simultaneousSets>
<people>
<person personID="bob">
<personInfo>
<ns2:fn>
<ns2:text>Bob</ns2:text>
</ns2:fn>
</personInfo>
<personType>minute taker</personType>
</person>
<person personID="alice">
<personInfo>
<ns2:fn>
<ns2:text>Alice</ns2:text>
</ns2:fn>
</personInfo>
<personType>presenter</personType>
</person>
<person personID="ciccio">
<personInfo>
<ns2:fn>
<ns2:text>Ciccio</ns2:text>
</ns2:fn>
</personInfo>
<personType>chairman</personType>
<personType>timekeeper</personType>
</person>
</people>
</clueInfo>
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18. MCC example
Enhancing the scenario presented in the previous example, the Media
Provider is able to advertise a composed capture VC7 made by a big
picture representing the current speaker (VC3) and two picture-in-
picture boxes representing the previous speakers (the previous one
-VC5- and the oldest one -VC6). The provider does not want to
instantiate and send VC5 and VC6, so it does not associate any
encoding group with them. Their XML representations are provided for
enabling the description of VC7.
A possible description for that scenario could be the following:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<clueInfo xmlns="urn:ietf:params:xml:ns:clue-info"
xmlns:ns2="urn:ietf:params:xml:ns:vcard-4.0" clueInfoID="NapoliRoom">
<mediaCaptures>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="audioCaptureType" captureID="AC0" mediaType="audio">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG1</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">main audio from the room</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>room</view>
<capturedPeople>
<personIDREF>alice</personIDREF>
<personIDREF>bob</personIDREF>
<personIDREF>ciccio</personIDREF>
</capturedPeople>
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</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC0" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">left camera video capture</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
<capturedPeople>
<personIDREF>ciccio</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC1" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
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<description lang="en">central camera video capture</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
<capturedPeople>
<personIDREF>alice</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC2" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">right camera video capture</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
<capturedPeople>
<personIDREF>bob</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC3" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<nonSpatiallyDefinable>true</nonSpatiallyDefinable>
<content>
<sceneViewIDREF>SE1</sceneViewIDREF>
</content>
<policy>Soundlevel:0</policy>
<description lang="en">loudest room segment</description>
<priority>1</priority>
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<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC4" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<encGroupIDREF>EG0</encGroupIDREF>
<spatialInformation>
<captureOrigin>
<capturePoint>
<x>0.5</x>
<y>1.0</y>
<z>0.5</z>
</capturePoint>
<lineOfCapturePoint>
<x>0.5</x>
<y>0.0</y>
<z>0.5</z>
</lineOfCapturePoint>
</captureOrigin>
</spatialInformation>
<individual>true</individual>
<description lang="en">zoomed out view of all people in the room
</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>room</view>
<capturedPeople>
<personIDREF>alice</personIDREF>
<personIDREF>bob</personIDREF>
<personIDREF>ciccio</personIDREF>
</capturedPeople>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC5" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<nonSpatiallyDefinable>true</nonSpatiallyDefinable>
<content>
<sceneViewIDREF>SE1</sceneViewIDREF>
</content>
<policy>Soundlevel:1</policy>
<description lang="en">penultimate loudest room segment
</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
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<view>individual</view>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC6" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<nonSpatiallyDefinable>true</nonSpatiallyDefinable>
<content>
<sceneViewIDREF>SE1</sceneViewIDREF>
</content>
<policy>Soundlevel:2</policy>
<description lang="en">last but two loudest room segment
</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
</mediaCapture>
<mediaCapture xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:type="videoCaptureType" captureID="VC7" mediaType="video">
<captureSceneIDREF>CS1</captureSceneIDREF>
<nonSpatiallyDefinable>true</nonSpatiallyDefinable>
<content>
<captureIDREF>VC3</captureIDREF>
<captureIDREF>VC5</captureIDREF>
<captureIDREF>VC6</captureIDREF>
</content>
<description lang="en">big picture of the current speaker +
pips about previous speakers</description>
<priority>1</priority>
<lang>it</lang>
<mobility>static</mobility>
<view>individual</view>
</mediaCapture>
</mediaCaptures>
<encodingGroups>
<encodingGroup encodingGroupID="EG0">
<maxGroupBandwidth>600000</maxGroupBandwidth>
<encodingIDList>
<encID>ENC1</encID>
<encID>ENC2</encID>
<encID>ENC3</encID>
</encodingIDList>
</encodingGroup>
<encodingGroup encodingGroupID="EG1">
<maxGroupBandwidth>300000</maxGroupBandwidth>
<encodingIDList>
<encID>ENC4</encID>
<encID>ENC5</encID>
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</encodingIDList>
</encodingGroup>
</encodingGroups>
<captureScenes>
<captureScene scale="unknown" sceneID="CS1">
<sceneViews>
<sceneView sceneViewID="SE1">
<description lang="en">participants' individual
videos</description>
<mediaCaptureIDs>
<captureIDREF>VC0</captureIDREF>
<captureIDREF>VC1</captureIDREF>
<captureIDREF>VC2</captureIDREF>
</mediaCaptureIDs>
</sceneView>
<sceneView sceneViewID="SE2">
<description lang="en">loudest segment of the
room</description>
<mediaCaptureIDs>
<captureIDREF>VC3</captureIDREF>
</mediaCaptureIDs>
</sceneView>
<sceneView sceneViewID="SE5">
<description lang="en">loudest segment of the
room + pips</description>
<mediaCaptureIDs>
<captureIDREF>VC7</captureIDREF>
</mediaCaptureIDs>
</sceneView>
<sceneView sceneViewID="SE4">
<description lang="en">room audio</description>
<mediaCaptureIDs>
<captureIDREF>AC0</captureIDREF>
</mediaCaptureIDs>
</sceneView>
<sceneView sceneViewID="SE3">
<description lang="en">room video</description>
<mediaCaptureIDs>
<captureIDREF>VC4</captureIDREF>
</mediaCaptureIDs>
</sceneView>
</sceneViews>
</captureScene>
</captureScenes>
<simultaneousSets>
<simultaneousSet setID="SS1">
<mediaCaptureIDREF>VC7</mediaCaptureIDREF>
<sceneViewIDREF>SE1</sceneViewIDREF>
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</simultaneousSet>
<simultaneousSet setID="SS2">
<mediaCaptureIDREF>VC0</mediaCaptureIDREF>
<mediaCaptureIDREF>VC2</mediaCaptureIDREF>
<mediaCaptureIDREF>VC4</mediaCaptureIDREF>
<mediaCaptureIDREF>VC7</mediaCaptureIDREF>
</simultaneousSet>
</simultaneousSets>
<people>
<person personID="bob">
<personInfo>
<ns2:fn>
<ns2:text>Bob</ns2:text>
</ns2:fn>
</personInfo>
<personType>minute taker</personType>
</person>
<person personID="alice">
<personInfo>
<ns2:fn>
<ns2:text>Alice</ns2:text>
</ns2:fn>
</personInfo>
<personType>presenter</personType>
</person>
<person personID="ciccio">
<personInfo>
<ns2:fn>
<ns2:text>Ciccio</ns2:text>
</ns2:fn>
</personInfo>
<personType>chairman</personType>
<personType>timekeeper</personType>
</person>
</people>
</clueInfo>
19. Diff with draft-ietf-clue-data-model-schema-10 version
Minor modifications have been applied to address nits at page https:/
/www.ietf.org/tools/idnits?url=https://www.ietf.org/archive/id/
draft-ietf-clue-data-model-schema-10.txt.
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20. Diff with draft-ietf-clue-data-model-schema-09 version
o We have introduced a <captureOrigin> element containing a
mandatory <capturePoint> and an optional <lineOfCapturePoint> in
the definition of <spatialInformation> as per Paul's review
o A new type definition for switching policies (resembled by
<policy> element) has been provided in order to have acceptable
values in the form of "token:index".
o Minor modifications suggested in WGLC reviews have been applied.
21. Diff with draft-ietf-clue-data-model-schema-08 version
o Typos correction
22. Diff with draft-ietf-clue-data-model-schema-07 version
o IANA Considerations: text added
o maxCaptureEncodings removed
o personTypeType values aligned with CLUE framework
o allowSubsetChoice added for multiple content captures
o embeddedText moved from videoCaptureType definition to
mediaCaptureType definition
o typos removed from section Terminology
23. Diff with draft-ietf-clue-data-model-schema-06 version
o Capture Scene Entry/Entries renamed as Capture Scene View/Views in
the text, <sceneEntry>/<sceneEntries> renamed as <sceneView>/
<sceneViews> in the XML schema.
o Global Scene Entry/Entries renamed as Global View/Views in the
text, <globalSceneEntry>/<globalSceneEntries> renamed as
<globalView>/<globalViews>
o Security section added.
o Extensibility: a new type is introduced to describe other types of
media capture (otherCaptureType), text and example added.
o Spatial information section updated: capture point optional, text
now is coherent with the framework one.
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o Audio capture description: <sensitivityPattern> added,
<audioChannelFormat> removed, <captureArea> disallowed.
o Simultaneous set definition: added <captureSceneIDREF> to refer to
capture scene identifiers as shortcuts and an optional mediaType
attribute which is mandatory to use when only capture scene
identifiers are listed.
o Encoding groups: removed the constraint of the same media type.
o Updated text about media captures without <encodingGroupIDREF>
(optional in the XML schema).
o "mediaType" attribute removed from homogeneous groups of capture
(scene views and globlal views)
o "mediaType" attribute removed from the global view textual
description.
o "millimeters" scale value changed in "mm"
24. Diff with draft-ietf-clue-data-model-schema-04 version
globalCaptureEntries/Entry renamed as globalSceneEntries/Entry;
sceneInformation added;
Only capture scene entry identifiers listed within global scene
entries (media capture identifiers removed);
<participants> renamed as <people> in the >clueInfo< template
<vcard> renamed as <personInfo> to synch with the framework
terminology
<participantType> renamed as <personType> to synch with the
framework terminology
<participantIDs> renamed as <capturedPeople> in the media capture
type definition to remove ambiguity
Examples have been updated with the new definitions of
<globalSceneEntries> and of <people>.
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25. Diff with draft-ietf-clue-data-model-schema-03 version
encodings section has been removed
global capture entries have been introduced
capture scene entry identifiers are used as shortcuts in listing
the content of MCC (similarly to simultaneous set and global
capture entries)
Examples have been updated. A new example with global capture
entries has been added.
<encGroupIDREF> has been made optional.
<single> has been renamed into <individual>
Obsolete comments have been removed.
participants information has been added.
26. Diff with draft-ietf-clue-data-model-schema-02 version
captureParameters and encodingParameters have been removed from
the captureEncodingType
data model example has been updated and validated according to the
new schema. Further description of the represented scenario has
been provided.
A multiple content capture example has been added.
Obsolete comments and references have been removed.
27. Acknowledgments
The authors thank all the CLUErs for their precious feedbacks and
support.
28. Informative References
[I-D.ietf-clue-datachannel] Holmberg, C., "CLUE Protocol data
channel",
draft-ietf-clue-datachannel-10
(work in progress), September 2015.
[I-D.ietf-clue-framework] Duckworth, M., Pepperell, A., and
S. Wenger, "Framework for
Presta & Romano Expires April 21, 2016 [Page 63]
Internet-Draft draft-ietf-clue-data-model-schema-11 October 2015
Telepresence Multi-Streams",
draft-ietf-clue-framework-23 (work
in progress), September 2015.
[I-D.ietf-clue-protocol] Presta, R. and S. Romano, "CLUE
protocol",
draft-ietf-clue-protocol-06 (work
in progress), October 2015.
[I-D.ietf-ecrit-additional-data] Gellens, R., Rosen, B., Tschofenig,
H., Marshall, R., and J.
Winterbottom, "Additional Data
Related to an Emergency Call",
draft-ietf-ecrit-additional-data-37
(work in progress), October 2015.
[RFC2119] Bradner, S., "Key words for use in
RFCs to Indicate Requirement
Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997, <
http://www.rfc-editor.org/info/
rfc2119>.
[RFC3550] Schulzrinne, H., Casner, S.,
Frederick, R., and V. Jacobson,
"RTP: A Transport Protocol for
Real-Time Applications", STD 64,
RFC 3550, DOI 10.17487/RFC3550,
July 2003, <http://
www.rfc-editor.org/info/rfc3550>.
[RFC3688] Mealling, M., "The IETF XML
Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<http://www.rfc-editor.org/info/
rfc3688>.
[RFC4353] Rosenberg, J., "A Framework for
Conferencing with the Session
Initiation Protocol (SIP)",
RFC 4353, DOI 10.17487/RFC4353,
February 2006, <http://
www.rfc-editor.org/info/rfc4353>.
[RFC5117] Westerlund, M. and S. Wenger, "RTP
Topologies", RFC 5117,
DOI 10.17487/RFC5117, January 2008,
<http://www.rfc-editor.org/info/
Presta & Romano Expires April 21, 2016 [Page 64]
Internet-Draft draft-ietf-clue-data-model-schema-11 October 2015
rfc5117>.
[RFC6351] Perreault, S., "xCard: vCard XML
Representation", RFC 6351,
DOI 10.17487/RFC6351, August 2011,
<http://www.rfc-editor.org/info/
rfc6351>.
[RFC7303] Thompson, H. and C. Lilley, "XML
Media Types", RFC 7303,
DOI 10.17487/RFC7303, July 2014, <h
ttp://www.rfc-editor.org/info/
rfc7303>.
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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