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Guidance in this section will be used with detailed guidance in Section 2.7.6, Metadata for Individual Health to implement collection standards.

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Collection of Dates

Collect dates in such a way as to allow sites to record only the precision they know. The system should also store only the collected precision. Any incomplete dates must remain incomplete with no imputation and no “zero-filling” of missing components. Data collection and database processes should allow for the possibility of partial dates and times, because a partial date may be the most precise information that can be collected for some data. 

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