Class Name: Absolute Time Interval

Superclass - <Time Interval>

Subclasses

Definition

An instance of this DRM class represents an interval of time defined by an absolute (GMT) start time, specified by the <Absolute Time Point> component, and a duration, specified by the fields of the <Absolute Time Interval> itself.

<Absolute Time Interval> provides

• a means to specify a time interval in terms of absolute time (GMT) for [CSDGM]-compliant metadata, and
• a general-purpose mechanism for describing intervals specified in terms of absolute (GMT) time.

Primary Page in DRM Diagram:

• 20

Secondary Pages in DRM Diagram:

Example

1. Consider a SEDRIS transmittal for which the data provider is to specify the time period for which that transmittal is to be considered valid. To specify this information, the <Transmittal Root> of the transmittal has an <Absolute Time Interval> component for which time_significance is set to SE_TIME_SIGNIFICANCE_PERIOD_OF_CONTENT. The stop time specified by the <Absolute Time Interval> can be considered to be an "expiration date".

FAQs

No FAQs supplied.

Constraints

• <<Legal Time Ranges>>
• <<Time Dependency>>
• <<Time Interval Calculation>>

Composed of (two-way)

• one <Absolute Time Point> instance (notes)

Component of (two-way)(inherited)

• zero or more <Environment Root> instances
• zero or more <Time Constraints Data> instances
• zero or one <Transmittal Root> instance
• zero or more <Month> instances
• zero or more <Season> instances
• zero or more <Sound Instance> instances
• zero or more <Source> instances

Inherited Field Elements

Field Elements

Notes

Composed of Notes

Absolute_Time_Point

 This represents the start of the <Absolute Time Interval>.

Fields Notes

time_significance

 This indicates the significance of the time information.

delta_days

 This is the number of days since the start of the
 <Absolute Time Interval>.

 See constraints on this class for cases where this may be
 negative.

delta_hours

 After delta_days has been taken into account, this is the
 number of hours since the start of the <Absolute Time Interval>,
 and therefore shall be a value between 0 and 23.

delta_minutes

 After delta_days and delta_hours have been taken into account,
 this is the number of minutes since the start of the
 <Absolute Time Interval>, and therefore shall be a value between
 0 and 59.

delta_seconds

 After delta_days, delta_hours, and delta_minutes have been
 taken into account, this is the number of seconds since the
 start of the <Absolute Time Interval>, and therefore shall be
 a value between 0.0 and 59.0.

 Fractions provide higher accuracy if needed, e.g. milliseconds.