The Start Aggregate defined in Table 36 retrieves the earliest raw value within the interval, and returns that value and status with the timestamp at which that value occurs. If no values are in the interval then the StatusCode is Bad_NoData.
Table 36 – Start Aggregate summary
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Start Aggregate Characteristics |
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Type |
Calculated |
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Data Type |
Same as Source |
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Use Bounds |
None |
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Timestamp |
Time of Raw Value |
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StatusCode Calculations |
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Calculation Method |
Custom The raw value status is returned |
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Partial |
Set Sometimes If an interval is not a complete interval |
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Calculated |
Not Set |
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Interpolated |
Not Set |
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Raw |
Always |
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Multi Value |
Not Set |
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StatusCode Common Special Cases |
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Before Start of Data |
Bad_NoData |
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After End of Data |
Bad_NoData |
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No Start Bound |
Does not apply |
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No End Bound |
Does not apply |
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Bound Bad |
Does not apply |
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Bound Uncertain |
Does not apply |
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