- element
Created: |
21.03.2007 16:35:16 |
Modified: |
19.01.2015 10:31:30 |
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Project: |
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Author: |
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Version: |
1.2 |
Phase: |
1.0 |
Status: |
Proposed |
Complexity: |
Easy |
Difficulty: |
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Priority: |
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Multiplicity: |
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Advanced: |
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UUID: |
{AE57D270-DFA5-4886-B346-26D31CDBC810} |
Appears In: |
XHydro |
This element contains information about the aggregation process.<br /></p><p><br /></p><p>Its attributes are<br /></p><p>- <b>frequency</b>: describes the measuring frequency of the intermediate values,<br /></p><p> and are, in fact, stored as a duration.<br /></p><p> For example a value of 1min means that an intermediate value is measured every minute. <br /></p><p> Typically, these values are not stored and are only used to build an aggregated value or to<br /></p><p> determine the maximum / minimum of a longer time span (e.g. a whole day).<br /></p><p><br /></p><p>- <b>interval</b>: aggregation interval, e.g. the period for which the value is representative<br /></p><p><br /></p><p>- <b>offset</b>: describes the time offset<br /></p><p> E.g., in case of a 30min interval with a 5min offset,<br /></p><p> the interval starts 5min and 35min after the full hour, etc..<br /></p><p><br /></p><p>- <b>level: </b>may be, for example, the value or delta-value, which (when exceeded/underrun)<br /></p><p> triggers a measurement in event-based time series.<br /></p>