Abstract Class Name: Time Interval

Superclass - Base Time Data

Subclasses

• Absolute Time Interval
• Relative Time Interval

Definition

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

1. The time period for which a SEDRIS transmittal should be considered to be valid. The stop time can be considered to be an "expiration date".

FAQs

What is the purpose of this class?

This class provides 1) FGDC-compatible 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 (one-way)(inherited)

• optionally, some Base Time Constraints Data
• optionally, some Environment Roots
• optionally, a Transmittal Root

Component of (one-way)

• optionally, some Months
• optionally, some Seasons
• optionally, some Sound Instances
• optionally, some Sources

Inherited Field Elements

Notes

Fields Notes

time_significance

 Used to indicate the significance of the time information