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Use the following Scheme extensions to manage multiple history streams when working with multiple parts.
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Part histories contain roll back information for all entities in a part. Obtain this history with
(history part).
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history
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Gets a history stream from a part or ID or string
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roll:delete-all-states
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Deletes all delta states
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The
default history contains history for entities without history and in a part without part history. When distributed history is off (FALSE), the default history contains all history. When distributed history is on (TRUE), the default history contains history for entities that could not be found in a part. Obtain the default history with
(history "default").
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