Agile Central - LookBack API: How can we tell the first snapshot?

Document ID : KB000112370
Last Modified Date : 29/08/2018
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When examining a snapshot retrieved by Lookback API, how can we tell if it's the first snapshot?
The first snapshot will have these characteristics. If any of the snapshot you examine has any of these characteristics then it is the initial snapshot of this artifact:

1. _SnapshotType = "Create"

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2. _SnapshotNumber = 0

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3. _PreviousValues will have all fields = null.

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Additional Information:
More on LookBack API, see: