Class Name: Absolute Time

Superclass - <Time Point>

Subclasses

Definition

An instance of this DRM class specifies an absolute time in UTC, which is not relative to some other point in time.

The <Absolute Time> class provides

1. a means to specify an absolute time (UTC) for metadata, and
2. a general-purpose mechanism for describing points in absolute (UTC) time.

Primary Page in DRM Diagram:

• 20

Secondary Pages in DRM Diagram:

Example

1. Consider a transmittal constructed from a historical database, in which the time at which an event happened is recorded as 1994-10-03T17:56:47Z. In the transmittal, this information is specified by an <Absolute Time> instance with time_significance = SE_TIMESIGNIF_OCCURRENCE as follows.

   time_significance	SE_TIMESIGNIF_OCCURRENCE
   time_value.value. ymd_hms.year	1994
   time_value.value. ymd_hms.month	SE_MONTH_OCTOBER
   time_value.value. ymd_hms.day	3
   time_value.value. ymd_hms.hour	17
   time_value.value. ymd_hms.minutes	56
   time_value.value. ymd_hms.seconds	47.0

2. Consider a transmittal for which the data provider wishes to represent the date and time when the transmittal was created. The time value is 2003-03-15T15:18:33Z. The data provider creates an <Absolute Time> instance with time_significance = SE_TIMESIGNIF_CREATION_DATE and the other field values set appropriately as follows.

   time_significance	SE_TIMESIGNIF_CREATION_DATE
   time_value.configuration	SE_TIMECFG_DATE_YMD_AND_TIME_HMS
   time_value.value. ymd_hms.year	2003
   time_value.value. ymd_hms.month	SE_MONTH_MARCH
   time_value.value. ymd_hms.day	23
   time_value.value. ymd_hms.hour	15
   time_value.value. ymd_hms.minutes	18
   time_value.value. ymd_hms.seconds	33.0

   This <Absolute Time> instance is then attached as a component of the <Transmittal Root> instance of the transmittal.

3. An <Absolute Time> instance is used to specify the date and time of observations.

FAQs

No FAQs supplied.

Constraints

• <<Publishable Object>>
• <<Legal Time Ranges>>

Component of (two-way) (inherited)

• zero or more <Environment Root> instances
• zero or more <Time Constraints Data> instances
• zero or one <Transmittal Root> instance

Component of (two-way)

• zero or more <Absolute Time Interval> instances
• zero or more <Citation> instances
• zero or more <Process Step> instances
• zero or more <Relative Time> instances
• zero or more <Relative Time Interval> instances

Inherited Field Elements

Field Elements

Notes

Fields Notes

time_significance

The time_significance field specifies the usage of the time information.

time_value

The time_value field specifies the time value.