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webtv-ISSUE-55 (HNTF_Report_Issues_3): Additions for Terminology section [HOME_NETWORK_TF]

From: Web and TV Interest Group Issue Tracker <sysbot+tracker@w3.org>
Date: Mon, 19 Sep 2011 00:19:34 +0000
To: public-web-and-tv@w3.org
Message-Id: <E1R5RaA-0001iP-Bu@lowblow.w3.org>

webtv-ISSUE-55 (HNTF_Report_Issues_3): Additions for Terminology section [HOME_NETWORK_TF]

http://www.w3.org/2011/webtv/track/issues/55

Raised by: Russell Berkoff
On product: HOME_NETWORK_TF

Additions for Terminology section to clarify DLNA/UPnP use-cases. Some terms relate to key-concepts in UPnP DLNA.

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·	item
For the purposes of this document, the term “item” refers to a set of metadata properties that may referenced (and retrieved) from a device by providing a unique identifier. Items are implemented using XML documents and associated XSD schemas. An “item” may describe several different types of home network objects including Content Items, Channel Items, EPG Items, Record Schedule (Items), Record Task (Items) as described below.
·	content item
For the purposes of this document, the term “content item” refers to metadata describing or more binary versions of media. The media described by an item may either be stored or streamed. A single content item may refer to multiple media binaries that represent different formats for the content being described.
·	channel item
For the purposes of this document, the term “channel item” refers to an “item” describing a streaming source. A channel item may contain metadata describing the channel source such as channel number, distribution network, etc. A channel may not be available on the home network, i.e. the “channel item” may refer to a channel that can only be locally tuned. In these cases “channel item” metadata will not provide network addressing information (URLs) to connect to the channel source.
·	epg item
For the purposes of this document, the term “epg item” refers to an item that may be available with some defined time range. An “epg item” may contain metadata describing the channel source for the content and the time range the channel media will be available.
·	record schedule (item)
For the purposes of this document, the term “record schedule” refers to an item which contains metadata describing a request to a network recording service to record content. “Record schedule items” may include: simple time/duration requests, recording of a specific “epg item”, and recording dynamically selected “epg items” based metadata properties of desired content. “Record schedule items” additionally include metadata describing the status of the recording request.
·	record task (item)
For the purposes of this document, the term “record task item” refers to an item which contains metadata describing a pending or completed network recording operation. “Record task items” are created by a network recording service and allow network record service clients to control pending recording operations. Additionally, “record task items” include metadata describing the status of the recording request and the identity of “content items” that represent the results of network recording operations.
·	home network media server
For the purposes of this document, the term “home network media server” refers to a home network device capable of supplying content metadata (See “item”). A “home network media server” may optionally be the source of the media described by “content items” or may “content items” may refer to media on different home network devices. In other cases, a “home network media server” may provide non-media descriptive items such as”epg items” or “record schedule/task” items.
·	home network media renderer
For the purposes of this document, the term “home network media renderer” refers to a home network device capable of rendering media binaries. . A “home network media renderer” can be commanded by an external home network device to play a media binary fetched over the home network. Additionally, a media renderer may optionally contain a control point which can obtain “content item” metadata from a “home network media server” and allows an end-user to select “content items” for playback. 
·	home network media player
For the purposes of this document, the term “home network media player” refers to a “home network media renderer” which contains an optional control point as discussed in the “home network media renderer” section.

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