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

Document ID : KB000112370
Last Modified Date : 29/08/2018
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Question:
When examining a snapshot retrieved by Lookback API, how can we tell if it's the first snapshot?
Answer:
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: https://rally1.rallydev.com/analytics/doc/#/manual