TimePeriod

From NOAA Environmental Data Management Wiki
Elements Definition and Recommended Practice
1 description 0..1 Textual description of the date and time documented.
2 descriptionReference 0..1
3 identifier 0..1
4 name 0..*
5 beginPosition 1 The beginning date or date and time of the resource contents. Use the ISO 8601 extended standard: YYY-MM-DD or YYY-MM-DDThh:mm:ssZ.
Example: 2010-06-05T12:00:17
.
If you don't know the start date, then use the indeterminatePosition attribute. Example:<gml:beginPosition indeterminatePosition="unknown"/>
6 endPosition 1 The ending date or date and time of the resource contents. Use the ISO 8601 extended standard: YYY-MM-DD or YYY-MM-DDThh:mm:ssZ . If the resource has a status of 'ongoing' then use the indeterminatePosition attribute without an end date value. Example: <gml:beginPosition indeterminatePosition="unknown/> <gml:endPosition indeterminatePosition="now"/> </code>
7 duration 0..1 Length of time between measurements. Use the ISO 8601 syntax for temporal length. Provide either duration or time interval if applicable. Example: <gml:duration>P1D</gml:duration>
8 timeInterval 0..1 Frequency between time events based on floating point values for temporal length. Provide either duration or time interval if applicable. Example: <gml:timeInterval unit="hour"> 6 </gml:timeInterval>

More Information

UML
EX Extent.png
Links
Examples
<gml:TimePeriod gml:id="ID006"> 
<gml:beginPosition>1846</gml:beginPosition>  
<gml:endPosition indeterminatePosition="now"/>
</gml:TimePeriod>
<gml:TimePeriod gml:id="ID003">
<gml:beginPosition>1992-01-01T00:00:00Z</gml:beginPosition>
<gml:endPosition>2007-12-31T00:00:00Z</gml:endPosition>
<gml:timeInterval unit="hour">6</gml:timeInterval>
</gml:TimePeriod>

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