rfc7865v3.txt   rfc7865.txt 
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a single SRC at a particular instant in time. Metadata changes from a single SRC at a particular instant in time. Metadata changes from
one snapshot to another reflect changes in what is being recorded. one snapshot to another reflect changes in what is being recorded.
For example, if a participant joins a conference, then the SRC sends For example, if a participant joins a conference, then the SRC sends
the SRS a snapshot of metadata having that participant information the SRS a snapshot of metadata having that participant information
(with attributes like (Name, AoR) tuple and associate-time). (Note: (with attributes like (Name, AoR) tuple and associate-time). (Note:
"AoR" means "Address-of-Record".) "AoR" means "Address-of-Record".)
Some of the metadata is not required to be conveyed explicitly from Some of the metadata is not required to be conveyed explicitly from
the SRC to the SRS, if it can be obtained contextually by the SRS the SRC to the SRS, if it can be obtained contextually by the SRS
(e.g., from SIP or Session Description Protocol (SDP) signaling). (e.g., from SIP or Session Description Protocol (SDP) signaling).
For example, the "label" attribute within the 'stream' XML element For example, the 'label' attribute within the 'stream' XML element
references an SDP "a=label" attribute that identifies an m-line references an SDP "a=label" attribute that identifies an m-line
within the Recording Session (RS) SDP. The SRS would learn the media within the Recording Session (RS) SDP. The SRS would learn the media
properties from the media line. properties from the media line.
5. Recording Metadata Format from SRC to SRS 5. Recording Metadata Format from SRC to SRS
This section gives an overview of the recording metadata format. This section gives an overview of the recording metadata format.
Some data from the metadata model is assumed to be made available to Some data from the metadata model is assumed to be made available to
the SRS through SDP [RFC4566], and therefore this data is not the SRS through SDP [RFC4566], and therefore this data is not
represented in the XML document format specified in this document. represented in the XML document format specified in this document.
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be sent whenever there is a change in media (e.g., a direction be sent whenever there is a change in media (e.g., a direction
change, like pause/resume, codec change, and/or participant change). change, like pause/resume, codec change, and/or participant change).
The MS object is represented in the XML schema using the 'stream' The MS object is represented in the XML schema using the 'stream'
element. element.
6.7.1. Attributes 6.7.1. Attributes
A MS class has the following attributes: A MS class has the following attributes:
o label - The "label" attribute within the 'stream' XML element o label - The 'label' attribute within the 'stream' XML element
references an SDP "a=label" attribute that identifies an m-line references an SDP "a=label" attribute that identifies an m-line
within the RS SDP. That m-line carries the media stream from the within the RS SDP. That m-line carries the media stream from the
SRC to the SRS. SRC to the SRS.
o content-type - The content of a MS element will be described in o content-type - The content of a MS element will be described in
terms of the "a=content" attribute defined in Section 5 of terms of the "a=content" attribute defined in Section 5 of
[RFC4796]. If the SRC wishes to convey the content-type to the [RFC4796]. If the SRC wishes to convey the content-type to the
SRS, it does so by including an "a=content" attribute with the SRS, it does so by including an "a=content" attribute with the
m-line in the RS SDP. m-line in the RS SDP.
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