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u |
64-bit DWORD
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u |
DC local
meaning
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u |
Assigned to
new object update transaction
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l |
If
transaction is aborted, the USN is not assigned
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to any object
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u |
Each object
carries two USNs
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l |
usnCreated
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l |
usnChanged
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u |
Each property
carries two USNs
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u |
Indexed
property in the database
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u |
Independent
from system time
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