Abstract Class Name: Time Interval

Superclass - <Base Time Data>

Subclasses

• <Absolute Time Interval>
• <Relative Time Interval>

Definition

An instance of this DRM class specifies an interval of time, defined by a start time and a stop time.

Primary Page in DRM Diagram:

• 20

Secondary Pages in DRM Diagram:

• 1
• 21

Example

See specific subclasses for examples.

FAQs

What is the purpose of this class?

This class provides 1) [CSDGM]-compliant metadata that describes the time period within which a high-level SEDRIS object (e.g. <Transmittal Root>, <Model>, <Image>, etc.) is valid, and 2) a general-purpose mechanism for describing time intervals. The <Time Interval> allows potential users of a SEDRIS transmittal to evaluate the time period covered by the transmittal, without necessarily having to actually obtain or examine the transmittal itself.

Constraints

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 <Month> instances
• zero or more <Season> instances
• zero or more <Sound Instance> instances
• zero or more <Source> instances

Inherited Field Elements

Notes

Fields Notes

time_significance

 This indicates the significance of the time information.