The SEDRIS Data Representation Model
APPENDIX A - Classes
Season
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Class Name: Season
Subclasses
This DRM class is concrete and has no subclasses.
Definition
An instance of this DRM class specifies the season of the year for
which the attributed object is applicable. (See examples).
Since the definition of a season of the year is relative to the
hemisphere being described, a <Time Interval>
component is required to specify the data provider's definition of the
specified season.
Primary Page in DRM Diagram:
Secondary Pages in DRM Diagram:
This class appears on only one page of the DRM class diagram.
Example
- Summer in the northern hemisphere, lasting from 21 June to 22 September
(any year). This would be represented as in the following diagram.
The <Season>'s <
Absolute Time Interval> component indicates the span of time covered
by the <Season>.
<Season>
season = SE_SEASON_SUMMER
<>
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<Absolute Time Interval>
delta_days = 93
delta_hours = 0
delta_minutes = 0
delta_seconds = 0.0
<>
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<Absolute Time Point>
year = -1 (indicates any year)
month = SE_MONTH_JUNE
day = 21
hour = 0
minutes = 0
seconds = 0.0
- Consider a <Time Related Geometry>
representing a forest in the northern hemisphere in winter, spring,
summer, and autumn. The branch for summer has a
<Time Constraints Data> link object
with a <Season> component resembling that in example 1.
FAQs
No FAQs supplied.
Constraints
None.
Composed of (two-way)
Component of (two-way)(inherited)
Notes
Composed of Notes
The interval of time covered by the <Season>.
Fields Notes
This indicates the significance of the time information.
A season of the year.
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Next: SEDRIS Abstract Base.
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Last updated: October 1, 2002
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Copyright © 2002 SEDRIS
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