- <li>There are a number of ways to annotate your data. The idea with annotations are to provide unambigous markup of your data, whether it be imaging, behavioral, clinical, etc. One strategy is to annotate the variables you intend to collect during the study design process. This can occur by choosing data structures that are publically available and already annotated (e.g. <a href="https://ndar.nih.gov/data_dictionary.html">NDAR</a>) or by using the tools below. Regardless of the approach, the important aspect is to unambigously describe what the variables collected mean, their ranges, min/max, units, etc. For more information on the desired properties for annotations, see: <a href="https://docs.google.com/spreadsheets/d/1PKoO9wqxJy92Je1doX_a42Ey2PzFOqGTxQgSpHtu7D4/edit#gid=632728597">Federated Data Elements</a>
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