DRAFT v0.9 03 Feb 2004

THE ELEMENTS
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Descriptions about the
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the PBCore Metadata

COMMENTS FROM RFC
DESCRIPTION	REFINEMENTS	EXPERTS

Describe this Element
Show Me Examples
Other Attributes of this Element

Describe this Element

Name	Format.TimeStart
Definition	Indicates a time stamp representing the beginning point for the playback of a resource. Use in combination with FORMAT.DURATION to identify a sequence or segment of a resource that has a fixed start time and end time.
Refinements and Encoding Schemes	AES46-2002 http://www.w3.org/TR/NOTE-datetime SMPTE 12M-1999 Television, Audio and Film – Time and Control Code http://www.smpte.org/smpte_store/standards/
Guidelines for Usage	PBCore recommends flexibility in expressing time stamps. Radio producers often prefer the simple HH:MM:SS designation. Television producers prefer the SMPTE time code standards HH:MM:SS:FF. Some multimedia architectures express time in HH:MM:SS.mmm, where the mmm represents milliseconds. Consequently, the best practice is to match the time stamp designation to your preferred method: HH:MM:SS HH:MM:SS.mmm HH:MM:SS:FF (SMPTE Timecode nondrop frame-NTSC) HH;MM;SS;FF (SMPTE Timecode drop frame-NTSC)
Obligation to Use	Mandatory
Repeatable Element	Apply once
Type of Data Entry	Text String

Show Me Examples

01:23:45:09 (SMPTE Timecode nondrop frame-NTSC)

01;23;45;09 (SMPTE Timecode dropframe-NTSC)

01:23:45.365 (Milliseconds Timecode)

02:34:35 (HH:MM:SS)

Other Attributes of this Element

Element Label	Format.TimeStart
Element Version	PBCore v1.1
Namespace Identifier	Public Broadcasting Metadata Dictionary Project [pending]
Registration Authority	PBMD Project [pending]
Language of the Element	eng