Absolute Time

The SEDRIS Data Representation Model APPENDIX A - Classes Absolute Time

Class Name: Absolute Time

Superclass - <Time Point>

Subclasses

This DRM class is concrete and has no 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

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

Primary Page in DRM Diagram:

Secondary Pages in DRM Diagram:

This class appears on only one page of the DRM class diagram.

Example

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

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